Moray eels, or Muraenidae, are a family of eels whose members are found worldwide. There are approximately 200 species in 15 genera which are almost exclusively marine, but several species are regularly seen in brackish water, and a few are found in fresh water.
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.
Sabertooth or sabretooth fish are small, fierce-looking deep-sea aulopiform fish comprising the family Evermannellidae. The family is small, with just eight species in three genera represented; they are distributed throughout tropical to subtropical waters of the Atlantic, Indian, and Pacific Oceans.
The stoplight loosejaws are small, deep-sea dragonfishes of the genus Malacosteus, classified either within the subfamily Malacosteinae of the family Stomiidae, or in the separate family Malacosteidae. They are found worldwide, outside of the Arctic and Subantarctic, in the mesopelagic zone below a depth of 500 meters. This genus once contained three nominal species: M. niger, M. choristodactylus, and M. danae, with the validity of the latter two species being challenged by different authors at various times. In 2007, Kenaley examined over 450 stoplight loosejaw specimens and revised the genus to contain two species, M. niger and the new M. australis.
The black ruff is a medusafish, the only member of the genus Centrolophus. It is a pelagic fish found in all tropical and temperate oceans at depths of 0 to 1,000 m. Its length is typically up to 60 cm (24 in), but it may reach 150 cm (60 in). Other common names include rudderfish and blackfish.
The pearleyes are a family, Scopelarchidae, of aulopiform ray-finned fish, distinguished by their unique visual system, with two retinas in each eye.
The brownsnout spookfish or brown-snout spookfish is a species of barreleye in the family Opisthoproctidae. It and the glasshead barreleye fish are the only vertebrates known to employ a mirror, in addition to a lens, to focus an image in its eyes. This species probably has a worldwide tropical and temperate distribution; in the Atlantic Ocean it is known from Bermuda, the Bahamas, the Greater Antilles, and the Gulf of Mexico, and in the Pacific Ocean it is known from the California Current region and the South China Sea. It is found in the mesopelagic and bathypelagic zones at a depth of 500–2,400 meters (1,600–7,900 ft), but usually occurs below 1,000 meters. In the Gulf of Mexico it is found shallower, at 310–460 meters (1,020–1,510 ft).
Gorgasia is one of the two genera that belong to the subfamily Heterocongrinae. This genus is classified by the behavioral pattern of burrowing 75% of their bodies in the sandy substrate they live in and protruding their upper body into the water current above, giving the appearance that they are planted into the ground. This protruding behavior serves a multipurpose functionality to their survival.
Betta coccina is a species of betta native to Peninsular Malaysia and Sumatra, Indonesia. It grows to a length of 5.6 cm (2.2 in). It can be found in the aquarium trade. Betta coccina, commonly known as the wine red betta or red fighting fish, is a species of freshwater fish in the family Osphronemidae. It is endemic to the peat swamps of Indonesia and Malaysia, where it inhabits acidic, slow-moving waters. The species is known for its striking red coloration and relatively peaceful temperament compared to other Betta species.
Benthalbella is a genus of pearleyes.
Scopelarchus is a genus of pearleyes.
Derilissus is a genus of clingfishes belonging to the family Gobiesocinae found in the western Atlantic Ocean. This family of fish is identified by their appearance as small fish with sucking discs which allow them to attach themselves to various surfaces. Derilissus differs from other genera due to its attached gill membranes.
The emerald rockcod, also known as the emerald notothen is a species of marine ray-finned fish belonging to the family Nototheniidae, the notothens or cod icefishes. It is native to the Southern Ocean
Lagiacrusichthys macropinna, the longfin greeneye, is a species of pearleye and the only species in the genus Lagiacrusichthys. L. macropinna live between 0–840 m depth, usually 500 m. This species occurs in Antarctic waters. This species is the only known member of its genus. The genus is named after the fictional monster Lagiacrus from the Monster Hunter video game series and franchise, as both are "rather ferocious coldwater predators" that inhabit the deep ocean.
Branchiostoma bennetti, the mud lancelet, is a lancelet of the genus Branchiostoma endemic to the Gulf of Mexico, where it is found in the northern part.
Regalecus russelii, or Russell's oarfish, is a species of oarfish in the family Regalecidae. It is a broadly-distributed marine fish, found in waters in the bathypelagic zone. R. russelii is a scaleless, elongate and ribbonlike fish, growing up to 8 meters in length.
Oneirodes sanjeevani is a species of marine ray-finned fish belonging to the family Oneirodidae, the dreamers, a family of deep sea anglerfishes known by a single specimen which was described in March 2017. The holotype was recovered by midwater trawling in the Indian Ocean west of the Maldives at 00.87°S, 67.59°E from a depth between 380 and 600 meters. The holotype, a female, has a standard length of 6.9 cm (2.7 in), with 5 soft rays in its dorsal fin and 4 in its anal fin. It is named in honor of Dr. V. N. Sanjeevan, who was the Director of the Centre for Marine Living Resources & Ecology in Kochi, Kerala, southern India.
Erik Bertelsen was a Danish ichthyologist, who specialised in deep sea fish. The fish, Diaphus bertelseniNafpaktitis, 1966 is named in his honour.
Benthalbella linguidens, the longfin pearleye, is a species of ray-finned fish that can be found in the North Pacific from Japan to California. It is a member of Benthalbella, a genus of pearleyes.
Scopelarchus guentheri, commonly known as the staring pearleye, is a mesopelagic ray-finned fish known for its unique visual system consisting of two retinas in each eye as well as a distinctive 'pearl organ' found inside each eye. Like other members of the genus Scopelarchus, S. guentheri has an opaque colored body.
