| Aldrovandia phalacra | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Notacanthiformes |
| Family: | Halosauridae |
| Genus: | Aldrovandia |
| Species: | A. phalacra |
| Binomial name | |
| Aldrovandia phalacra (Vaillant, 1888) [1] | |
| Synonyms [1] | |
| |
Aldrovandia phalacra, the Hawaiian halosaurid, is a species of ray-finned fish in the family Halosauridae. It is a circumglobal species found at bathyal depths.
Aldrovandia phalacra is a long, slim, cylindrical fish growing to a length of 40 to 50 centimetres (16 to 20 in). The snout is pointed with the upper jaw longer than the lower jaw. There are several separate palatine patches with teeth on the roof of the mouth. There are no scales on the snout, head or operculum. Mature males with ripe gonads have their nostrils extended into a dark coloured tube. There is a row of 24 to 28 large scales along the lateral line. The dorsal fin has 10 to 12 soft rays, the ventral fin has 1 spine and 8 soft rays and the pectoral fin has 1 spine and 11 to 13 soft rays. The head is steely blue, darker below, with a dark line edging the gill covers. The body is pale grey. [2]
Aldrovandia phalacra is a deep water fish, living at depths of 500 to 2,300 metres (1,600 to 7,500 ft). It is found in warm waters on the continental shelf, around islands [3] and in the vicinity of seamounts. [1] Its range includes the Eastern Atlantic between 15° N and 45° N, the Western Atlantic at similar latitudes, the coastal shelves of South Africa and Brazil, the Indian Ocean and the vicinity of Hawaii. [2] During exploratory trawls round the Bear Seamount, it was the commonest species of fish. [4]
Aldrovandia phalacra is benthopelagic. It hovers within a few metres of the seabed, darting down to catch the small invertebrates on which it feeds. [2] These include amphipods, mysids, copepods and Polychaete|polychaete worms. [3]
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.
The spiny-back eel, Notacanthus sexspinis, is a deep-sea spiny eel of the genus Notacanthus, found in all the Southern Hemisphere oceans at depths between 500 and 1,000 m. The length of this fish is up to 60 cm (24 in).
The Percophidae, duckbills, are a family of percomorph fishes, from the order Trachiniformes, found in tropical and subtropical waters of the Atlantic and Indian Oceans and in the southwestern and southeastern Pacific.
Pentaceros richardsoni, the pelagic armourhead, Richardson's boarfish or southern boarfish, is a species of marine ray-finned fish, an armourhead from the family Pentacerotidae. It has a wide distribution in the oceans of the southern hemisphere. It is commercially important as a food fish.
Epigonus telescopus, the black cardinal fish, is a species of deepwater cardinalfish found in most temperate oceans worldwide, at depths of between 75 and 1,200 metres though mostly between 300 and 800 metres. It can reach a length of 75 centimetres (30 in) TL though most specimens do not exceed 55 centimetres (22 in) TL. It has been reported that this species can reach an age of 104 years.
Mullus barbatus is a species of goatfish found in the Mediterranean Sea, Sea of Marmara, the Black Sea and the eastern North Atlantic Ocean, where its range extends from Scandinavia to Senegal. They are fished, mostly by trawling, with the flesh being well regarded. The International Union for Conservation of Nature has assessed their conservation status as being of "least concern".
The Bear Seamount is a guyot or flat-topped underwater volcano in the Atlantic Ocean. It is the oldest of the New England Seamounts, which was active more than 100 million years ago. It was formed when the North American Plate moved over the New England hotspot. It is located inside the Northeast Canyons and Seamounts Marine National Monument, which was proclaimed by President of the United States Barack Obama to protect the seamount's biodiversity.
The vermilion snapper, the clubhead snapper, night snapper or beeliner is a species of marine ray-finned fish, a snapper belonging to the family Lutjanidae. It is native to the western Atlantic Ocean.
The surge wrasse, also known as the green-blocked wrasse, purple wrasse or red and green wrasse, is a species of wrasse native to the southeast Atlantic Ocean through the Indian and Pacific Oceans, where it inhabits reefs and rocky coastlines in areas of heavy wave action at depths from the surface to 10 m (33 ft). This species is of minor importance to local commercial fisheries, is popular as a game fish, and can be found in the aquarium trade.
The seaweed blenny is a species of combtooth blenny found in coral reefs in the western Atlantic Ocean along the coasts of New York, Bermuda, the Bahamas, also in the Gulf of Mexico, south to southern Brazil. This species reaches a length of 8.5 centimetres (3.3 in) TL.
Aldrovandia is a genus of ray-finned fish in the family Halosauridae. This genus currently contains the following recognized species:
Menticirrhus saxatilis, the northern kingfish or northern kingcroaker, is a species of marine fish in the family Sciaenidae. It lives in the shallow coastal waters of the western Atlantic Ocean and Gulf of Mexico.
Menticirrhus americanus, the southern kingfish, southern kingcroaker, king whiting, Carolina whiting, sea mullet, roundhead, or whiting, is a species of marine fish in the family Sciaenidae. It lives in shallow coastal waters on the western fringes of the Atlantic Ocean.
Coryphaenoides rupestris is a species of marine ray-finned fish in the family Macrouridae. Its common names include the rock grenadier, the roundnose grenadier and the roundhead rat-tail. In France it is known as grenadier de roche and in Spain as granadero de roca. It is a large, deep-water species and is fished commercially in the northern Atlantic Ocean.
Macrourus berglax, the roughhead grenadier or onion-eye grenadier, is a species of marine ray-finned fish in the family Macrouridae. It is a deep-water fish found in the Atlantic Ocean.
The west coast seabream or west coast steenbras is a species of marine fish in the family Sparidae. It is found in very shallow water off the coasts of to Angola, Namibia and South Africa. The International Union for Conservation of Nature lists its conservation status as being "near threatened".
The sand steenbras or striped seabream is a species of marine fish in the family Sparidae. It is found in shallow water in the Mediterranean Sea and in the eastern Atlantic Ocean from France to South Africa. It also occurs in the Red Sea and off the coast of Mozambique in the Indian Ocean. The IUCN has assessed its conservation status as being of "least concern".
Parapercis alboguttata, the bluenose grubfish, known also as the bluenose sandperch and whitespot sandsmelt, is a species of marine bony fish in the family Pinguipedidae, native to the western Indo-Pacific Ocean. It was first described by the German-born, British ichthyologist and zoologist, Albert Günther, in 1872.
The short beard codling is a species of marine bony fish in the family Moridae. Native to the western Atlantic Ocean, it is found on the continental slope at depths between 50 and 1,620 m.
Gerres nigri, the Guinean striped mojarra is a species of mojarra native to the eastern Atlantic Ocean. It inhabits estuaries, coastal waters and lagoons. This species can reach a maximum length of 20 cm (8 in), with 15 cm (6 in) being a more common size.
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