The orange roughy, also known as the red roughy, slimehead and deep sea perch, is a relatively large deep-sea fish belonging to the slimehead family (Trachichthyidae). The UK Marine Conservation Society has categorized orange roughy as "vulnerable to exploitation". It is found in 3 to 9 °C, deep waters of the Western Pacific Ocean, eastern Atlantic Ocean, Indo-Pacific, and in the eastern Pacific off Chile. The orange roughy is notable for its extraordinary lifespan, attaining over 200 years. It is important to commercial deep-trawl fisheries. The fish is a bright, brick-red color, fading to a yellowish-orange after death.
The silver roughy or Mediterranean slimehead is a small deep-sea fish species belonging to the slimehead family (Trachichthyidae). It is found widely at depths of 100 to 1,175 m (328–3,855 ft) in the Atlantic, ranging from Iceland and Georges Bank in the north to South Africa and Brazil in the south, including the Mediterranean and Gulf of Mexico. It is also found in the Western Indian Ocean, including the Red Sea.
Hoplostethus is a genus of fish in the slimehead family.
Hoplostethus vniro is a small deep-sea fish species belonging to the slimehead family (Trachichthyidae). It is found in the eastern Central Atlantic in marine environment within a bathydemersal depth range, which is a deep-water habitat. This species reaches the average length of about 19.6 centimetres (7.7 in).
Hoplostethus fedorovi is a small deep-sea fish species belonging to the slimehead family (Trachichthyidae).
The blacktip sawbelly is a small deep-sea fish species belonging to the slimehead family (Trachichthyidae). It is found off southern Australia and New Zealand. It ranges at depths from 200 to 680 metres where it lives on the continental shelf and continental slope. It can reach sizes of up to 18.0 centimetres (7.1 in).
The palefin sawbelly is a medium-sized deep-sea fish species belonging to the slimehead family. It is native to Australia's southern waters and the Eastern Indian Ocean where it lives at depths between 146 and 586 metres on the continental slope and continental shelf. It can reach sizes of up to 53.0 centimetres (20.9 in) TL.
Hoplostethus confinis is a species of slimehead native to the Andaman Sea in the Indian Ocean. It lives in deep water between 290m and 330m from the surface and can reach sizes of up to 12.3 cm.
Hoplostethus crassispinus is a species of slimehead found in the Pacific Ocean. It can be found in Hawaii and the Kyushu–Palau Ridge and possibly off the coast of Vietnam. It lives at depths between 280m and 600m and can reach sizes of up to 25.4 cm.
Hoplostethus druzhinini is a species of slimehead native to the western Indian Ocean off the coast of Yemen. It lives in deep water between 330m and 445m and can reach sizes of up to 13.1 cm.
The Red Sea roughy is a slimehead of the order Beryciformes. It is found in the Western Indian Ocean and the Red Sea at depths of up to 520 m (1,710 ft). It can reach sizes of up to 12.2 cm (4.8 in) SL. The species is known from only five specimens.
The New Zealand giant sawbelly is a slimehead of the order Beryciformes. It is native to the South Pacific, more specifically the sub-tropical and temperate latitudes of the Tasman and South Fiji basins. It is also found along Australia's southeastern coast, the Bay of Plenty, and southern Kermadec Ridge at the north end of New Zealand's North Island. It can reach sizes of up to 51.5 cm (20.3 in) SL. Its natural habitats are "continental slopes, seamounts, and submarine rises" between 250–400 m (820–1,310 ft), though it has been found as shallow as 140 metres (460 ft) and as deep as 760 m (2,490 ft). The first H. melanopeza caught were thought to be individuals of the H. gigas species, and it was not distinguished as a separate species until much later. One key difference between the two is that although both are red, H. melanopeza has black fin margins.
The blackfin roughy is a slimehead of the order Beryciformes. It has a very wide distribution across the Atlantic, Pacific, and Indian Oceans. It can reach sizes of up to 14.0 cm (5.5 in) TL. It is a deepwater fish, living between 454–1,500 m (1,490–4,921 ft) deep.
The smallscale slimehead is a deepwater fish of the family Trachichthyidae. It lives on the continental shelf at a depths of 400–914 m (1,312–2,999 ft). It can reach sizes of up to 25.0 cm (9.8 in) TL. It is a brownish-grey color with blackish fins. It is found in the Indian and Pacific Oceans along the coasts of South Africa, Somalia, the United Arab Emirates, Madagascar, Japan, Indonesia, and Namibia.
Hoplostethus mento, more commonly known as the slimy head, is a member of the family Trachichthyidae. It is native to the Eastern Pacific from the Bay of Panama to Valparaiso, Chile. It can reach sizes of up to 12.0 centimetres (4.7 in) TL. It is a deepwater fish, living in a range of 725 to 1,355 metres below the surface.
Hoplostethus mikhailini is a deepwater species of the family Trachichthyidae. It is native to the Southeast Atlantic and Western Indian Ocean from the Cape of Good Hope to Delagoa Bay where it lives as depths ranging from 273 to 525 metres. It can reach sizes of up to 14.7 centimetres (5.8 in) SL.
Hoplostethus ravurictus is a member of the family Trachichthyidae It is native to the Eastern Indian Ocean off Australia's western coast where it can be found at depths of between 250 and 1,000 metres. It can reach sizes of up to 14.1 centimetres (5.6 in) SL.
Hoplostethus rifti is a member of the family Trachichthyidae It is found in the Western Indian Ocean around northern tip of Madagascar at depths of up to 500 metres (1,600 ft). It can reach sizes of up to 7.5 centimetres (3.0 in) SL.
The thickspine roughy is a slimehead of the order Beryciformes. It is native to the Northwestern Pacific near the Philippines and Japan where it can be found as deep as 660 m (2,170 ft). It can reach sizes of up to 35.4 cm (13.9 in) SL.
The Metavay sawbelly is a slimehead of the order Beryciformes. It is native to the Indian Ocean along the northern section of the Mentawai ridge and western Australia. It can be found at depths between 800–875 m (2,625–2,871 ft) on the continental slope and can reach sizes of up to 20.3 cm (8.0 in) SL.
