| Scopelogadus beanii | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Beryciformes |
| Family: | Melamphaidae |
| Genus: | Scopelogadus |
| Species: | S. beanii |
| Binomial name | |
| Scopelogadus beanii (Günther, 1887) | |
| Synonyms [2] | |
| |
Scopelogadus beanii, or Bean's bigscale, is a species of ridgehead fish. [3] [4] [5] It is named for Tarleton Hoffman Bean.
Bean's bigscale is dark brown or black in colour, with a maximum length of 12.2 cm (4.8 in). It is one of the largest and deepest-dwelling ridgeheads. It has two dorsal spines, one anal spine, 10–11 dorsal soft rays and 7–9 anal soft rays. Its caudal peduncle (the tapered region behind the dorsal and anal fins where the caudal fin attaches to the body) is long. [6] It has ridges of thin bones supporting deep mucous cavities on the head. [7]
Bean's bigscale is mesopelagic and bathypelagic, living at depths of up to 2,500 m (8,200 ft), and is common in the Atlantic Ocean, Pacific Ocean, Indian Ocean and Tasman Sea. [8]
Scopelogadus beanii feeds on amphipods, polychaetes, jellyfish and mysids. [9] [10]
Macrouridae is a family of deep sea fish, a diverse and ecologically important group, which are part of the order of cod-like fish, the Gadiformes. The species in the Macrouridae are characterised by their large heads which normally have a single barbel on the chin, projecting snouts, and slender bodies that taper to whip-like tails, without an obvious caudal fin but what there is of the caudal fin is often confluent with the posterior dorsal and anal fins. There are normally two dorsal fins, the anterior dorsal fin is quite high, the posterior quite low but is longer and takes up a greater proportion of the fish's of the back, species in the subfamily Macrouroidinae have a single dorsal fin. The long anal fin is almost as long as the second dorsal fin is nearly as long as the posterior dorsal, and sometimes it is longer. The pelvic fin is inserted in the vicinity of the thorax and normally has 5-17 fin rays but are absent in Macrouroides. The body is covered in small scales and if they have a photophore, it is usually on the midline of the abdomen just in front of the anus. The bioluminescence of these fish is produced by symbiotic bioluminescent bacteria. The structure of the skull has been used to show their placing in the Gadiformes, but they differ from the typical cods in that they possess one stout spine in the anterior dorsal fin.
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.
Scopelogadus is a genus of ridgeheads. The generic name derives from the Greek σκόπελος and γάδος.
The Bean's sawtooth eel is an eel in the family Nemichthyidae. It was described by Theodore Gill and John Adam Ryder in 1883. It is a marine, deep water-dwelling eel which is known from throughout the Atlantic Ocean, the Indian Ocean, and the Western Pacific Ocean, including Iceland, South Africa, Réunion, and Australia. It dwells at a depth range of 0–5998 metres, and leads a solitary lifestyle. It migrates vertically at night. Males can reach a maximum total length of 78-80 centimetres, making it the largest sawtooth eel.
Melanocetus murrayi, commonly known as Murray's abyssal anglerfish, is a deep sea anglerfish in the family Melanocetidae, found in tropical to temperate parts of the world's oceans at depths down to over 2,000 m (6,600 ft). Its length is up to 13.5 cm (5 in) for females and up to 2.8 cm (1.1 in) for males.
The longnose tapirfish is a species of deep-sea spiny eel that lives in bathypelagic environments, and is a host of an endoparasite, Brachyenteron rissoanum.
The Jeffrey's goby is a species of goby fish.
The false boarfish is a species of fish in the family Oreosomatidae (oreos).
The large-eye snaggletooth, also called the straightline dragonfish or Antarctic snaggletooth, is a species of fish in the family Stomiidae.
Schnakenbeck's searsid is a species of fish in the family Platytroctidae (tubeshoulders).
The rendezvous fish is a species of fish in the family Phosichthyidae (lightfish).
Polymetme thaeocoryla is a species of fish in the family Phosichthyidae (lightfish).
Nansenia oblita, also called the forgotten argentine or the Mediterranean large-eyed argentine, is a species of fish in the pencil smelt family (Microstomatidae).
The Arctic rockling, also called the silver rockling or Arctic threebeard, is a species of fish in the family Lotidae.
Leptostomias gladiator is a species of fish in the family Stomiidae. It is sometimes called the scaleless dragonfish, but that name is shared with many other species.
Sudis hyalina is a species of fish in the family Paralepididae (barracudinas).
Oneirodes carlsbergi is a species of anglerfish in the family Oneirodidae (dreamers). It takes its name from the Carlsberg Foundation, which funds scientific research.
Stomias boa, also known as the boa dragonfish, scaly dragonfish, dragon-boa or boa scaly dragonfish, is a species of deep-sea fish in the family Stomiidae.
Stomias boa ferox is a subspecies of deep-sea fish in the family Stomiidae.
Lyconus brachycolus is a species of hake fish in the family Merlucciidae.
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