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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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Lionfish are native to the warm, tropical waters of the South Pacific and the Indian Ocean and there are different theories about how they arrived in Florida.
According to the university, lionfish feed off other fish and marine organisms.
Both sea surface warming and the recent expansion of the Suez Canal have allowed the lionfish to colonise almost the entire southeastern coast of Cyprus in just one year.
Biological invasion of the Indo-Pacific lionfish Pterois volitans along the Atlantic coast of North America.
The unique lionfish tracking map came about as a result of several groups of concerned divers who felt the need for this type of tool to help their small island nations get a better grasp on just how extensive the problem with invasive lionfish has become.
In order to describe the epidemiology of lionfish exposures, mechanisms of envenoming and poisoning, presenting manifestations, management, and prevention of injuries and foodborne poisonings, internet search engines, including PubMed, Medline, Ovid, Google[R], and Google Scholar[R], were queried with the key medical subject heading (MESH) words, "lionfish, envenomation; scorpionfish (Scorpaenidae), injuries; poisoning, ciguatera, ciguatoxin.
Kobo, a global leader in e-reading, and multichannel distributor Lionfish, have launched Kobo's digital reading platform in the GCC.
Discovery describes the island "as an utterly unforgiving deserted destination where the reefs alone are fraught with dangers that include venomous stonefish, lionfish and scorpion fish.
Florida has become infamous for the invasive species that have made a home there: Giant Burmese pythons, Old World climbing fern, and spiky, zebra-striped lionfish plague the state's land and waters.
LIONFISH/CARIBBEAN SEA: Over the past 20 years, lionfish, an invasive species, has spread out of control in the Caribbean and seriously impacted local marine biodiversity.