P. antennata is a very attractive fish marked in the typical striped lionfish pattern, with alternating red/brown and white vertical bands. The rays of its pectoral fins are connected with a membrane that encompasses about half the length of the rays, leaving the outer half of each ray free. The webbed area is marked with (typically) a single row of dark eye spots (ocellae), and the independent tips of the rays extend past the caudal peduncle. The base of the pectorals are marked with two dark, crescent-shaped bands near the fish’s body, and finally, what would an antennae lion be without a pair of long supraorbital appendages? This fish is frequently mistaken for P. mombassae, and vice-versa, and like most lionfish, P. antennata is not sexually dimorphic/dichromic.
Medium-Bodied Lionfish :
Pterois antennata (Spot-Fin Lionfish, Antennata Lionfish, Broadbarred Firefish, Ragged Finned Lionfish)
Maximum Size: 7” - 8” TL ~ 18 - 20 cm).
Natural Habitat:Inhabits lagoon and seaward reefs slopes, typically found in caves and overhangs by day. Distribution is the Indo-Pacific: East Africa to Marquesan and Mangaréva islands, north to southern Japan, south to Queensland, Australia and Kermadec and Austral islands.
Depth: 2 to 50 m (~ 7 - 164 ft).
Minimum Tank Size: 55 g (~ 208 l).
Our specimen took readily to stick feeding, and eats the standard scorp fare of fish, shrimp, squid, lobster, etc. we serve at “Chez Scorp”, although in the wild, this fish feeds primarily on crustaceans. To that end, picky eaters or new fish that are being conditioned should be offered live ghost shrimp, small crawfish, or fiddler crabs as first foods.
P. antennata makes a great addition to a medium to large fish-only or reef display. A final word regarding tankmates: P. antenatta has a rather large mouth, even by lionfish standards, so bear this in mind when choosing tankmates.
(Mombassa Lionfish, African Lionfish, Frillfin Turkeyfish, Devil Lionfish, Deepwater Firefish)
Maximum Size: 7” – 8” TL (~ 18 - 20 cm).
Natural Habitat:Reef-associated, often found in association with sponges or on muddy bottoms. Distribution is Indo-West Pacific: Durban in South Africa, Sri Lanka, India, and New Guinea.
Depth: range to about 60 m, usually 40+ m. (~ 131 - 197 ft).
Minimum Tank Size: 55 g (~ 208 l).
This gorgeous fish is often confused with P. antennata, as they are indeed very similar in appearance. Both species sport a pair of supraorbital appendages (antennae), however, the Mombasa’s striping pattern is rather unique in that the red/brown stripes of this fish have an almost fuzzy, textured appearance. Additionally, it has much larger eyes (almost disproportionately large) than its cousin as well as more numerous, multiple rows of ocellae on its pectoral fins. They also have a dark cheekspot on the operculum that is absent in the antennata. Most of the specimens we have seen have striping that is so red, they almost resemble peppermint sticks. On the subject of its large eyes, I should mention that this fish will often be one of the first fish in a given system to have issues with water quality, and their eyes tend to cloud over as a result of poor water quality and bacterial infections. That being said, we have not found this fish any more difficult to keep than most other lions, providing they receive good husbandry.
As far as feeding is concerned, once weaned, they’re a typical lionfish that will soon recognize its keeper and will pray to The Food God, hoping for a handout. They do perch a bit, but they spend a good amount of time in the water column as well. This lion isn’t super common, but is a real eye-catcher and a fabulous fish if you happen to
(Radiated Lionfish, Clearfin Lionfish, Tailbar Lionfish, Radial Firefish, Whitefin Lionfish, White-striped Lionfish)
Maximum Size:8”- 9” TL (~ 20 - 23 cm).
Natural Habitat:Occurs on coral heads, reef flats and lagoons, typically found within caves and crevices. Its range is the Indo-Pacific: Red Sea to Sodwana Bay, South Africa and to the Society Islands, north to the Ryukyu Islands, south to New Caledonia.
Depth: 1 to 30 m (~ 3 - 98 ft).
Minimum Tank Size: 50 g (~ 189 l).
Given our love for all things scorp, we have a hard time saying that a particular lionfish is THE prettiest, but this species would definitely be on the short list. It is one of the species that we most often field questions about, simply based on looks alone. Speaking of looks, this fish is easily identified by the two horizontal white stripes on its caudal peduncle. Radiata lions exhibit broad vertical body bands that are typically dark red/maroon/brown, sometimes with a darkish green/black tint to them. These dark bands are separated by thin, stark white stripes. The lower rays of their long pectoral fin are connected by a membrane near the body up to about a quarter of their length, and the membranes of their second dorsal, anal and caudal fins lack color or markings, hence one of this fish’s common names: clearfin lionfish. This species typically sports a pair of supraorbital antennae.
Radiata lions tend to ship poorly, so finding a pristine, healthy specimen may take some patience. However, a few minor dings should heal up and disappear in pretty short order with good food and low-stress tank conditions. Another thing makes this fish a bit more of a find (and more expensive) is the fact that in the wild, it is a bit more rare than many lionfish species.
Like the other medium lionfish species, P. radiata feeds on crustaceans (mostly crabs and sometimes shrimp) in the wild. Therefore, a new fish that is being conditioned (or stubborn weaners) should be offered live ghost shrimp, small crawfish, or fiddler crabs as first foods. Radiated lionfish approach their prey in an interesting forward-tilted, head-down attitude with their pectoral fins outstretched.This species has been dubbed difficult to keep due them being poor shippers, the fact that they are intolerant of poor water quality, and are sometimes difficult to feed/wean. However, although our specimen did look a bit rough from being in the procurement chain, it is a solid stick-feeder and will eat almost anything it is offered.
Large-Bodied Lionfish :
1- Pterois russelii (Russel’s Lionfish, Clearfin Lionfish, Plaintail Firefish, Plaintail Turkeyfish, Spotless Butterfly Cod, Spotless Firefish, Zebrafish, Red Volitans)
Maximum Size: 10” TL (~ 25 cm).
Natural Habitat:Found on muddy substrates, from well-protected shallow estuaries to quiet, deep offshore reefs. Distribution is Indo-Pacific: Persian Gulf and East Africa to New Guinea, south to Western Australia.
Depth: 15 - 60 m (~ 49 - 197 ft).
Minimum Tank Size: 75 g (~ 284 l).
Russel’s lionfish can best be described as a volitans in a slightly smaller package, both in habits and care. It is often seen offered for sale under the incorrect common name red volitans. I actually asked the owner of an aquarium shop why he mis-ID’s this fish, and he told me “The people who really know, know, but most people don’t, and it avoids confusion”. I can’t say I agree with the logic, especially since he has a bit of a passion for oddball fish, but I guess it works for some folks.
P. russelii is most easily identified by the lack of spots on its caudal and median fins, which also gives rise to one of its common names clearfin lionfish. Its white body is adorned with reddish-brown vertical bands, which are sparser and more widely spaced and than those of
P. volitans. Additionally, Russels lionfish lack the dark markings under its chin that the volitans has. Once you see a Russel’s, you won’t mistake them as P. volitans thereafter.
This fish is bold, and is almost always out and about in the water column. It is extremely tolerant of tankmates (unless it thinks they’re snack-size), and handles polluted water very well. If you like P. volitans, but don’t quite have the room for one, P. russelii is for you!
(Common Lionfish, Red Lionfish, Red Firefish, Turkeyfish, Butterfly Cod, Scorpion Cod, Featherfins, Peacock Lionfish, Zebrafish, Black Volitans)
Maximum Size: 15” TL (~ 38 cm).
Natural Habitat:Occurs in association with reefs, drop-offs, and rocky caves. Indo-West Pacific: Red Sea and East Africa to Samoa, north to southern Japan and the Ogasawara Islands, south to Australia and Lord Howe Island.
Depth: 2 - 55 m (~ 7 - 180 ft).
Minimum Tank Size: 100 g (~ 397 l).
This species is what one would have to consider THE lionfish. Whenever a person mentions that they keep a lionfish, it is most likely
P. volitans. At this writing, we have kept nine species of lionfish, and although each species has its own allure, there is nothing quite like an adult P. volitans in terms of sheer presence and graceful beauty. They make the ultimate centerpiece fish for the larger aquarium. Unfortunately, these fish are often offered as 2” juveniles, and many keepers are unaware as to how large and/or how fast these fish can grow, so many specimens end up being cramped and tank-stunted instead of being able to spread their fins and cruise about their tank.
Coloration can be variable, and is generally associated with the geographic location a given fish hails from. Generally speaking, there are basic two color morphs: white with black body bands or white with red/brown banding. There is also a dark, almost completely black color morph that is a bit more rare, but quite interesting to see. Unlike the Russel’s lionfish, the median and caudal fins of P. volitans have several small dark spots on them. One of the most noticeable traits of juvie volitans lions are their very long, individually-sheathed pectoral fin rays. The short membrane at the base of each pectoral fin is clear, and the outer edge is adorned with several ocellae, or eye spots in juvenile specimens. These spots mimic the eyes of a small cluster of prey fish, and serve to confuse and calm the baby lion’s prey. However, these spots and the clear membrane disappear as the fish grow. As the fish mature, they also grow into their pectorals, thus, you may see some adult specimens with short pectorals and a squatty, bulldog-like body, while others retain a fair amount of their pectoral fin sweep. There is supposition that the difference between shorter and longer-finned specimens may be geographical locale. Juvenile specimens also exhibit two supraorbital tentacles (antennae) that typically disappear as the fish ages, although there are some adult fish that keep them for life.
P. volitans is typically very easy to feed and wean, and weaning is often accomplished by simply adding a chunk of food to the water column, as this species has a voracious appetite. Their maximum prey size is often underestimated by aquarists who watch in horror as their adult volitans slurps down a 6”+ long tankmate in the blink of an eye.
This species is probably the most forgiving of all lionfish species in terms of water quality and other forms of negligence visited on them by the aquarist. In fact, in the past, this fish was sometimes used to cycle new setups, as they could handle the various spikes in water chemistry. One of the most often made mistakes with this fish is to under-tank it. Even a smaller adult will end up being a 12” cube (including fins), so they require a minimum front-to-back depth of 18” just to be able to turn around comfortably.
People frequently try to mix volitans with triggers. Some people have had success, which can be found more frequntly with the pelagic species of triggers. And then there is the more common outcome of a lion and a trigger below. It's your risk. Have a plan "B" if it doesn't work out.
Just always remember, that adorable face you see at the LFS.....
will soon turn into a lion-sized adorable face.
In a two year span, this lion went from a walnut to a football.
Temperate Species :
(Bluefin Lionfish, Blackfoot Lionfish)
Maximum Size: 5”-6” TL (~ 13 - 15 cm).
Natural Habitat:Usually found on open reef flats, in sheltered coastal bays and fine sand or muddy habitats. Indo-West Pacific: Natal, South Africa to southern Japan. Two populations apparently exist, one in the Western Pacific and the other off the SE African coast.
Depth: Depth: 40 - 300 m (~ 131 - 984 ft).
Minimum Tank Size: 30 g (~ 114 l).
This rare and elusive species is mostly known from specimens brought in as by catch from commercial trawlers, thus, very little is known about its natural diet or social habits. Bluefins are gorgeous little lions (we consider them a dwarf species). They have the body and pectorals of the Dendrochirus lions, the mustache of the Fu Manchu, and the dorsal spines of a Pterois lion. Their bodies are grey with various shades of cinnamon-colored banding. However, their most notable visual trait are the electric blue broken bands on the axillary surfaces of
their pectoral fins which are used as flash colors to warn away and confuse predators. The pelvic fins of the bluefin are typically black, hence the common name “blackfoot lionfish”. Finally, the trailing edge of their caudal fin is perfectly straight (squared-off), with the uppermost ray elongated to form a streamer. If it weren’t for the difficulty in keeping this fish, it may very well be the perfect lionfish in terms of appearance and size.
Another interesting habit of the bluefin is the fact that they are often seen out in the open resting or even partially buried in shallow depressions which they excavate in the soft substrate. When startled, this lion will rear up in its depression, directing the business ends of its dorsal spines toward the attacker. If the attacker persists, it will flash its pectorals and rotate itself 360º in an effort to bewilder the offender as well as to have the ability to defend itself in place. It will leave its foxhole only as a last resort.
Personal Anecdotal Information Regarding the Husbandry of P. heterura:
This little lion is definitely a rare find, and a special case, as to have even a small chance of keeping it alive for any appreciable length of time, itmust be kept under temperate conditions (less than 65ºF). We have been fortunate enough to have had our specimen under our care for well over a year, however, the early months were indeed rough.
Although some hobbyists have reported their fish simply dropping dead, we and at least one other hobbyist we know of have found that bluefins seem to be quite susceptible to bacterial infections, which present rapidly, and ragingly. We had one specimen that literally had its lower jaw melt off almost overnight (not a pretty thing to see). However, our other specimen (we had purchased two of them) would get an odd-looking lesion or hole in its pectoral, and we administered oral antibiotics immediately. Each time, we were able to arrest and heal the infection. I should also note that each time this occurred, we lowered the temperature of the water by a few degrees (we had begun at 70 ºF). Once the water temperature hit 63ºF, we stopped seeing these outbreaks. Coincidence? Maybe, however, there are much fewer bacteria in a closed system at colder temperatures, and a much greater dissolved oxygen content (it has been theorized by some that this fish may be sensitive to low dissolved oxygen content).
Our specimen is a solid stick feeder, accepting most of the fare we feed to our other scorps. However, although it does eat well, it doesn’t strike the food very hard, and has a small mouth, so smaller food items work best.
Bluefins seem to be available in the early-mid springtime, so if you’re looking for a real challenge and have a dedicated temperate setup for this fish, you might want to give the bluefin a try.
Please Don’t Feed Me Goldfish!:
Now that we have your attention, let’s discuss feeding your lions. First of all, let’s talk about live feeder fish. The flesh of freshwater fish does not contain the proper fatty acids required to keep saltwater predators healthy. This is especially true of members of the carp family, such as goldfish, koi, and rosy reds. Another big problem is that these fish also contain high concentrations of the enzyme Thiaminase, which inhibits the uptake of Thiamine. An extended diet of freshwater feeders usually results in poor growth rate, disorders of the nervous system, clamped fins, cessation of feeding, and you guessed it, an early death.
Another food to avoid is krill, frozen or freeze-dried. Krill has been linked to lockjaw in many predatory species, and although it is typically well-received by most fish, it is not recommended. In fact, some people in the hobby refer to freeze-dried krill as fish crack since some fish will decide they will only eat this food and nothing else once it has been offered a few times.
About now is where you might be wondering “OK, smart guy, just what DO I feed my fish?” so let’s find out:
While we don’t recommend a steady diet of live food, it may be necessary to feed newly acquired specimens live fare initially to get them eating, or in some cases, where certain fish are difficult, or simply refuse to be weaned onto dead foods, this may be their diet for life.
Ghost or grass shrimp (fresh or saltwater) are both excellent foods, especially since they can be enriched (gutloaded) with nutritious goodies like high quality flake food, spirulina, beta glucan, etc. simply by feeding your feeders a last supper or two of nutrition-packed goodies.
Livebearers, such as guppies, mollies, or platies are also good choices. These fish can also be enriched prior to feeding them out. You may want to go the extra mile and convert them to brackish or full saltwater if this will be a long-term feeding option.
Appropriately-sized damsels make great feeders, and can sometimes be ordered in lots at a discount at some LFS or e-tailers. We usually give these fish a 20 minute freshwater dip prior to feeding them out to decrease the risk of introducing parasites.
Live saltwater minnows or anchovies also make tasty treats, so if you have access to them, and can find them of appropriate size, they are a good alternative if live foods are necessary. Be careful of collecting them off of wharfs or piers, as the water in these areas are often tainted with pollutants.
We would like to note that smaller specimens will also hunt down live pods with great relish and will decimate a tank’s population in fairly short order.
Silversides are an excellent food since they are easily stuffed with pelletized food, powders such as spirulina, vitamins (C, B6, B12) or beta glucan, etc. One can also find many other frozen foods in the freezer at the local fish store (LFS), however, I find that a wider variety of fresher, high quality seafood is available at the grocery store or local fish market. Surprisingly, when purchased in small amounts, it is actually less expensive to feed your lions people food rather than fish food. Some of the foods we’ve had good success with are red snapper, salmon, tuna, cod, shrimp (uncooked, shell-on), lobster, scallops, clams, and squid. Try what’s on sale, try different foods to see what your fish find tasty. These foods can be cut up into bite-sized chunks, placed into bags and frozen for later use. If you arrange individual feeding bags, it is easy for a fish sitter to feed the fish should you be out of town for more than a few days for some reason.
Smaller specimens will also take mysis (we use Hikari and Piscene Energetics), and even brine shrimp (we use Hikari Brine Shrimp Plus). With the exception of one of our stingfish which eats PE mysis from a pile on the substrate, these foods are simply thawed, rinsed, and placed into the water column.
We’re often asked “how large should the chunks be?”, and although it depends on the size and species of the fish and its mouth size, if you stay right around the size of the fish’s eye or just a tad larger, you’ll never be wrong. If your fish happens to get a larger chunk than you had planned and seems to be choking, what the fish is actually doing is using its pharyngeal teeth to position and soften (deglutinate) the food item prior to swallowing. If this
happens a lot, try giving the fish smaller chunks.
For a detailed article regarding weaning techniques, be sure to read Tools of the Trade: Feeding Techniques.
Due to their sedentary nature and slow metablolism, adult lionfish should only be fed twice or three times a week. Feed them until you see a slight bulge in their bellies, once you see this, you will understand my meaning. We do, however, feed our juvenile specimens a bit more often since much of their caloric intake is used for growing. A good feeding schedule for us has been to feed the adults Monday-Wednesday-Friday. Our juvies typically get a bit of food each day between normal feedings.
Given the chance, many lions will overeat, sometimes to the point of regurgitation, which obviously, should not be encouraged. In a short time, you will get a feel for how many food items of appropriate size make up a meal for your fish.
Overfeeding your fish on a long term basis will likely shorten its life due to hepatic lipidosis (fatty liver degeneration). Additionally, owing to these fishes’ slow metabolism, large food items can sometimes begin to decompose in a lionfish’s digestive tract before it can be digested, resulting in bloating and death. Don’t worry if this paragraph seems scary, it’s simply helpful to know.
Housing Your Lionfish:
Due to their sedentary nature, lionfish can be kept in tanks from 30 gallons on up, depending on species. While it is always best to research the aquascaping requirements of a given species, a tank with a good amount of surface area as well as height is a good choice. Fu Manchus will appreciate long or wide tanks as they do little, if any, swimming. Although most lions will live in bare-bottom setups, we have had good success with #1 or #3 grade aragonite as a substrate material, and quite frankly, we prefer the look of substrate. Live rock caves and overhangs are appreciated by most lions, as well as stands of macroalgae, which also aid in water quality via nutrient export. A bit of rubble here and there on the substrate will complete the setting.
Biofiltration should be robust, no matter what type of equipment you use, as lions tend to produce a pretty fair amount of waste. Also, many of the foods they eat are a bit oily, so I recommend a good skimmer and surface turbulance. Sump-based systems will boost water volume, and are my favorite option. Again, lots of live rock and macroalgae are your friends.
Generally speaking, lionfish are not very fussy about their lighting requirements. For the most part, they are crepuscular (dawn/dusk) predators, so their lighting can be simple normal output (NO) fluorescents, however, they are just as happy under brighter lighting, provided they have a dimmer spot to shelter in if they so desire. So, the rule of thumb is to light their tank with lighting suitable for their tankmates. Whatever type of lighting you use, a dawn/dusk photoperiod using actinic and daylight lamps would be a perfect lighting scheme.
Lionfish make excellent reef candidates, as they have no interest in coral, and will not harm them. Frank Marini, noted lionfishaficionado and guru, has coined the phrase that lions are reef limiting in that they will indeed eat ornamental shrimp, crabs, and any fish that will fit into their often cavernous mouths. One thing I do want to mention is that on rare occasions, some lionfish decide they like a certain coral (typically a softy) and will use that coral as a perch/resting spot. If this happens, and it seems that the coral is stressing, try moving it, although I have had a P. volitans find the same coral in its new spot and continue perching on it.
One final word of caution: believe it or not, lionfish can, and will jump from the aqaurium, and this is especially true of the dwarf species. To prevent your pet from becoming lionfish jerky, you'll want to cover the tank with plastic eggcrate, netting, glass, etc.
Disclaimer: This treatment guideline is not meant to replace appropriate professional medical treatment when available. Its focus is to help provide First Aid as a first response before seeking medical treatment when necessary. If you utilize any information provided in this document, you do so at your own risk and you specifically waive any right to make a claim against the authors of this guideline for the results or consequences of any attempt to use, adopt, adapt or modify the information presented in this document.
You've probably been wondering this in the back of your mind ever since you decided to read this article, haven't you? We could go into the mechanics of how the venom is injected, however, this is really more of a lionfish primer, and we’d hate to have you nodding off. That being said, the absolute best advice we can offer is “DON’T GET STUNG!” However, accidents do happen, and what can we say? It's going to hurt... just how much depends on which species you take the hit from, its size, how much venom is injected, and the time the spine is embedded in your skin.
”The Big Question”…What Do I Do If I’m Stung?
First aid for a lionfish sting is immersion of the affected area in hot water (114°F) for 20 up to 90 minutes, or until the pain subsides, in order to inactivate the thermolabile components of the venom. The reason for applying heat to the wound is because lionfish venom is composed of heat labile proteins, and the heat actually denatures the venom. Please, don't use scalding-hot water, as the resulting burn will likely do more damage than the venom. To ensure the proper temperature have a cooking thermometer on hand.
Don't worry, unless you happen to be allergic to the venom, or you get stung by a stonefish, your life really isn't in danger from the effects of the venom. That being said, you need to guard against secondary infection of the wound as well as make certain that there are no pieces of the spine left in the wound, which can cause infection. A tetanus booster is recommended if it is past due. To that end, you may want to seek professional medical assistance, just in case.
Fortunately, in over 20 years of keeping venomous fish, neither of us has never been stung (knock on wood), so we can’t tell you what it feels like. However, we're not in a hurry to find out, as we're told it really hurts. One thing that may make lions a bit more dangerous than other scorpionfish in terms of getting poked is the fact that they are very inquisitive, and some of the bolder specimens that become very accustomed to you will swim around the exact spot you’re working in. Tapping these fish lightly on their tails can teach them to mean go to a neutral corner, and they will typically stay thee. Could this backfire on us someday? You betcha, however, here are some tips for working in the lion’s den:
1-Always respect the fish, and know where they are at all times when working on the tank. If you happen to be performing a chore that requires a lot of your concentration, you may want to enlist the aid of a spotter to let you know if the fish is nearby (this is a perfect job for young helpers).
2-Never make the fish feel threatened or cornered. Perform your work deliberately and in a non-threatening manner. Get to know your fish, and let it get to know you. Lionfish are pretty intelligent and will become accustomed to you working in their box of water.
3-Know the warning signs that a lion has gone into a defensive posture. They will typically erect their dorsal spines and assume a head-down position, thus bringing their daggers to bear in the direction of the perceived threat.
4-Don’t pet the fish! This was actually meant as a joke, but I know of at least one case, where a person thought her lionfish was so puppy-like and tame that she tried to pet it and got poked for her trouble. She was unaware of the first aid for a sting, applied ice to the wound, and ended up in the ER.
Although marine aquarists have been keeping lionfish and their kin for quite awhile, it is our hope that this article has piqued your interest in them. They are interactive, peaceful, hardy and disease-resistant fish, each with their own distinct personality, and they are certainly one of the most easily-recognized group of fish you are likely to encounter. Our Scorp Jones began with lionfish, and it has been a pleasure sharing our passion for them, and giving you a window to their care and habits, as well as other useful information and tips based on practical experience for keeping them successfully. Happy lion-taming, and remember: You’re not in Kansas anymore!
All photos/illustrations/movies/ are the property of Lionfish Lair ©
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