The snailfishes or sea snails are a family of marine ray-finned fishes. These fishes make up the Liparidae, which is classified within the order Scorpaeniformes.
The Cyclopteridae are a family of marine fishes, commonly known as lumpsuckers or lumpfish, in the order Scorpaeniformes. They are found in the cold waters of the Arctic, North Atlantic, and North Pacific oceans. The greatest number of species are found in the North Pacific. The family name Cyclopteridae derives from the Greek words κύκλος (kyklos), meaning "circle", and πτέρυξ (pteryx), meaning "wing" or "fin", in reference to the circle-shaped pectoral fins of most of the fish in this family.
Ridgeheads, also known as bigscales, are a family of small, deep-sea stephanoberyciform fish. The family contains approximately 37 species in five genera; their distribution is worldwide, but ridgeheads are absent from the Arctic Ocean and Mediterranean Sea. Although the family is one of the most widespread and plentiful of deep-sea families, none of its members are of interest to commercial fishery.
A viperfish is any species of marine fish in the genus Chauliodus. Viperfishes are mostly found in the mesopelagic zone and are characterized by long, needle-like teeth and hinged lower jaws. A typical viperfish grows to lengths of 30 cm (12 in). Viperfishes undergo diel vertical migration and are found all around the world in tropical and temperate oceans. Viperfishes are capable of bioluminescence and possess photophores along the ventral side of their body, likely used to camouflage them by blending in with the less than 1% of light that reaches to below 200 meters depth.
Etmopterus is a genus of lantern sharks in the squaliform family Etmopteridae. They are found in deep sea ecosystems of the Atlantic, Indian and Pacific Oceans.
Coryphaenoides is a genus of rattails which is found in all oceans of the world. They are found in deep waters and C. yaquinae, recorded to 7,012 m (23,005 ft), is the only member in the family known from the hadal zone.
Epigonus is a genus of fish in the family Epigonidae found in the Atlantic, Indian and Pacific Ocean. The genus was erected by Constantine Samuel Rafinesque in 1810.
Paraliparis is a genus of fish in the family Liparidae, the snailfishes. It is found in benthic, benthopelagic and pelagic habitats in all the world's oceans.
Careproctus is a genus of snailfishes found in benthic and benthopelagic habitats in the Atlantic, Pacific, Arctic and Southern Oceans. Whether they truly are absent from the Indian Ocean is unknown and might be an artifact of limited sampling. They range from shallow coastal seas in the far north of their range to the abyssal zone, at depths of 6 to 5,459 m (20–17,910 ft). In the Northern Hemisphere they mostly live shallower than Paraliparis, but this pattern is reversed in the Southern Hemisphere. Although almost entirely restricted to very cold waters, a single species, C. hyaleius, lives at hydrothermal vents.
Liparis is a large genus of snailfish from the northern hemisphere. They are very common in temperate and cold waters. Chernova (2008) has proposed that the genus should be subdivided into five subgenera: Liparis, Neoliparis, Lycocara, Careliparis, and Lyoliparis.
Dolichopteryx is a genus of barreleyes.
Chlorophthalmus is a genus of greeneyes
Poromitra crassiceps, commonly called the crested bigscale is a species of deep sea fish in the ridgehead family.
Melamphaes is a genus of fish in the family Melamphaidae found in Atlantic, Indian and Pacific Ocean.
Scopelogadus is a genus of ridgeheads. The generic name derives from the Greek σκόπελος and γάδος.
Malacocottus is a genus of fatheads native to the northern Pacific Ocean. Malacocottus are typically occupied in the benthic zone near the bottom of the northern Pacific Ocean.
Caristius is a genus of manefishes native to the Atlantic and Pacific Oceans.
Pentaceros is a genus of marine ray-finned fish, armorheads from the family Pentacerotidae. They are native to the Pacific, Indian, and eastern Atlantic Oceans. Pentaceros is the only genus in the monotypic subfamily Pentacerotinae.
Dolichopteryx andriashevi is a species of fish found known only from waters of the Philippine Sea in the Pacific Ocean.
Dolichopteryx vityazi is a species of fish found in the Pacific Ocean.
