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common name for a genus (Pterois) of the family Scorpaenidae (see rockfishrockfish,
member of the family Sebastidae (rockfishes) according some authorities, but also classified as a member of the family Scorpaenidae (scorpionfishes, lionfishes, and rockfishes) by other authorities, carnivorous fish inhabiting all seas and especially abundant in the
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), comprising venomous subtropical marine fish native to the South Pacific, the Indian Ocean, and the Red Sea. Native to the Indian and South Pacific oceans, the red lionfish (P. volitans) has a striking appearance and coloration, with red, cream, and brown or black bands on the body, fanlike pectoral fins, and dorsal, anal, and tail fins with dark spots on a clear background. It has venomous spines on the dorsal, pelvic, and anal fins. It grows quickly and can reach 15 in. (38 cm) and weigh up to 2.6 lb (1.2 kg) at maturity. Primarily reef dwellers, they are most active at night, hiding during the day. Popular with saltwater aquarium hobbyists, the red lionfish is now found in North American waters from North Carolina to Caribbean Sea. The devil firefish or common lionfish (P. miles), which is native to the Indian Ocean and similar to the red lionfish in appearance, also is an invasive species in same waters. Lionfish appear to be unappetizing to native fish, and consume commercially important species as well as marine life that feed those species. Although they have a severely painful sting, they are safe to eat and are being promoted as a food fish.

Lionfish are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Actinopterygii, order Scorpaeniformes, family Scorpaenidae.

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Less lion fish means more species and quantities of other fish.
There's also a venomous lion fish and several species of puffer fish including the bridal burr-fish, the porcupine fish and the dog-faced puffer, which looks a bit like a harbor seal.
The latest in the canon, Deuce Bigalow: Male Gigolo (15), sees Rob Schneider (yet another from the Saturday Night Live alumni) play a fish tank cleaner who finds himself baby-sitting a rich and ruthlessly fastidious gigolo's $800 lion fish while he goes on holiday.
Turtles, manta rays and lion fish weave through the reefs and there's even the chance to dive with dolphins.
The fish are not as friendly as this," he said, watching the long, slow-motion floating spines of the venomous lion fish as it stares back at him, while a porcupine puffer, a three-toned paddle-fin wrasse and a harlequin tusk fish, which has prominent blue teeth, swim past.
We found it interesting their names were relevant to other animals - for example, the lion fish and the spider crab.
Like the lion fish, they have venomous dorsal fins that can deliver a very serious sting.
Lion fish with their poisonous spiky fins lurked in the coral while three-foot angel fish swam within feet of us, and a huge turtle munched contentedly on weed.
DEADLY species - Lion fish, piranhas, moray eels, conger eels, weever fish.
Five hundred to 700 fish, including a Whitetip Shark, Starfish, Lion Fish and Grouper, inhabit the Ocean Explorer.