| Diceratias | |
|---|---|
 | |
| Diceratias bispinosus | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Lophiiformes |
| Family: | Diceratiidae |
| Genus: | Diceratias Günther, 1887 |
| Type species | |
| Diceratias bispinosus | |
Diceratias is a genus of deep sea marine ray-finned fish belonging to the family Diceratiidae, the double anglers. These fishes are found in the Eastern Atlantic and Indo-Pacific regions.
Diceratias was first proposed as a monospecific genus in 1887 by the German-born British herpetologist and ichthyologist Albert Günther when he described Diceratias bispinosus. [1] When he described D. bispinosus Günther gave the type locality as off Banda Island at a depth of 360 fathoms (2,160 ft; 660 m) on the Challenger expedition of 1872-1876. [2] This genus is one of two genera in the family Diceratiidae which the 5th edition of Fishes of the World classifies within the suborder Ceratioidei within the order Lophiiformes, the anglerfishes. [3]
Diceratias prefixes di, meaning "two" onto the genus name Ceratias. This genus was thought to be a subgenus of Ceratias with two cephalic spines instead of one. [4]
Diceratias contains the following species: [5]
Direcatias doubleanglers are sexually dimorphic. The metamorphosed females can be separated from other females in the suborder Ceratioidei by the possession of a second, club-like exposed cephalic spine bearing a bioluminescent organ at its tip. In this genus the spine is on the snout rather than being located at the back of the head as in Bufoceratias , the forward tip of the illicium's pterygiophore is exposed while in Bufoceratias it is hiddden and it has a deep trough it can be retracted into. The spine is shorter than in Bufoceratias having a length equivalent to between 27% and 47% of the standard length. They also have a large mouth which reaches back beyond the eye, a well developed spine on the symphysis of the mandible which reaches just past the maxilla, the presence of vomerine teeth, there are large spines in the skin, [6] [7] the dorsal fin has between five and seven rays while the anal fin has four rays and they have a small small pelvic bone which is joined to the cleithrum. The second cephalic spine is positioned directly behind the base of the first cephalic spine, or illicium [3] and can be pulled down beneath the skin in individuals with a total length greater than 1.3 cm (0.51 in) leaving a small pore to show its location. [8] The males have spinules in the skin, they have two teeth on the snout and two transverse rows of 4 or 5 teeth on the lower jaw, all separate from each other. The eyes and nostrils of the males are directed laterally. [9] The largest species in the genus is D.pileatus with a maximum published standard length for a metamorphosed female of 23.5 cm (9.3 in). [5]
Diceratias double anglers are found in the Eastern Atlantic Ocean and the Indo-Pacific, they are bathypelagic fishes which are found in tropical and subtropical waters, on or near the continental shelf at depths between 533 and 2,306 m (1,749 and 7,566 ft). [10]
The footballfish form a family, Himantolophidae, of globose, deep-sea anglerfishes found in tropical and subtropical waters of the Atlantic, Indian, and Pacific Ocean. The family contains 23 species, all of which are classified in a single genus, Himantolophus.
Fanfins or hairy anglerfish are a family, Caulophrynidae, of marine ray-finned fishes within the order Lophiiformes, the anglerfishes. The fishes in this family are found almost around the world in the deeper, aphotic waters of the oceans.
Double anglers, the family Diceratiidae, is a small and little known family of rarely encountered marine ray-finned fishes belonging to the order Lophiiformes, the anglerfishes. The two genera and seven species of this family are found in the deeper waters of the tropical and subtropical Atlantic, Indian and Pacific Oceans. They are distinguished from other deep sea anglerfishes by the possession of a second bioluminescent cephalic spine. The fishes in this family were known only from metamorphosed females and the males were not described until 1983.
The toothed seadevil, spiny seadevil or netbeard seadevil,, is a rarely seen deep-sea anglerfish found in the mesopelagic and bathypelagic zones in Oceans around the World. It is the only species in the family Neoceratidae, and is unique amongst the deep-sea anglerfish in lacking an illicium and esca, and in having large teeth placed on the outside of its jaws.
Tetrabrachiidae, or the four-armed frogfishes or doublefin frogfishes, is a small family of marine ray-finned fishes belonging to the suborder Antennarioidei in the order Lophiiformes, the anglerfishes. These fishes are found in relatively shallow waters of the eastern Indian Ocean and western Pacific Ocean.
The anglerfish are fish of the teleost order Lophiiformes. They are bony fish named for their characteristic mode of predation, in which a modified luminescent fin ray acts as a lure for other fish. The luminescence comes from symbiotic bacteria, which are thought to be acquired from seawater, that dwell in and around the sea.
Black seadevils are small, deepsea lophiiform fishes of the family Melanocetidae. The five known species are all within the genus Melanocetus. They are found in tropical to temperate waters of the Atlantic, Indian, and Pacific Oceans, with one species known only from the Ross Sea.
Histiophryne is a genus of marine ray-finned fishes belonging to the subfamily Histiophryninae in the family Antennariidae, the frogfishes. These fishes are found in waters ranging from Taiwan to South Australia. There are currently five known species. These fishes are easily distinguished from other anglerfishes as having a reduced luring appendage, a highly evolved form of the first dorsal fin spine.
Antennarius is a genus of anglerfish belonging to the family Antennariidae, the frogfishes. The fishes in this genus are found in warmer parts of the Atlantic, Indian and Pacific Oceans.
Bufoceratias is a genus of marine ray-finned fishes belonging to the family Diceratiidae, the double anglers. Thee fishes in this genus are found i the Indian, Pacific and Western Atlantic Oceans.
Bufoceratias wedli is a species of deep sea marine ray-finned fish belonging to the family Diceratiidae, the double anglers. This anglerfish is found in deep water over the continental shelf in the tropical and subtropical areas of the Eastern and Western Atlantic Oceans. It is the type species of the genus Bufoceratias and like other members of that genus is known only from adult females, the unknown males are thought to be free living rather than sexual parasites of the females like those of some other deep sea anglerfishes.
Antennatus is a genus of marine ray-finned fishes belonging to the family Antennariidae, the frogfishes. The fishes in this genus are found the Indian and Pacific Oceans.
Caulophryne polynema is a species of marine ray-finned fish belonging to the family Caulophrynidae, the fanfins. This species is a deepwater species which is found in the Atlantic and Pacific Oceans. Like other deepwater anglerfishes it shows extreme sexual dimorphism with the males being much smaller than the females and acting as sexual parasites of the females.
Caulophryne is a genus of marine ray-finned fishes belonging to the family Caulophrynidae, the fanfins or hairy anglerfishes. These fishes are found throughout the non-polar oceans of the world.
Robia is a monospecific genus of marine ray-finned fish belonging to the family Caulophrynidae, the fanfins. Its only species is Robia legula which is known from a single specimen collected in the western central Pacific Ocean where it is found at depths of 1,000 to 1,500 metres.
Lophiodes is a genus of marine ray-finned fishes belonging to the family Lophiidae, the goosefishes, monkfishes and anglers. It is one of four extant genera in the family Lophiidae. The fish in this genus are found in the Atlantic, Indian and Pacific Oceans.
Caulophryne bacescui of marine ray-finned fishes belonging to the family Caulophrynidae, the fanfins or hairy anglerfishes. It is known from a single specimen collected from the Eastern Pacific Ocean.
Bufoceratias shaoi is a species of double angler, a type of anglerfish. The fish is bathypelagic and has been found at depths ranging from 0 to 1,200 metres. It has been found in the western Indian Ocean and western Pacific Ocean. It was first described in 2004 by Theodore Pietsch, Ho Hsuan-Ching & Chen Hong-Ming.
Diceratias bispinosus, the two-rod angler, is a species of deep sea marine ray-finned fish belonging to the family Diceratiidae, the double anglers. This species is found in the Indo-Pacific region.
Antennatus tuberosus, the tuberculate anglerfish, pygmy angler, pygmy frogfish or tuberculated frogfish, is a species of marine ray-finned fish belonging to the family Antennariidae, the frogfishes. This fish is found in the Indian and Pacific Oceans.
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