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[8] [27] Coelacanths are large, plump, lobe-finned fish that can grow to more than 2 m (6.6 ft) and weigh around 90 kg (200 lb). [28] They are estimated to live up to 100 years, based on analysis of annual growth marks on scales, and reach maturity around the age of 55; [ 29 ] the oldest known specimen was 84 years old at the time of its ...
The Black kokanee or Kunimasu, once thought to be extinct, is now classed as extinct in the wild. This list of freshwater fish recorded in Japan is primarily based on the IUCN Red List, which, for fish found in inland waters, details the conservation status of some two hundred and sixty-one species, seventy-three of them endemic. [1]
As of September 2016, the International Union for Conservation of Nature (IUCN) lists 65 extinct fish species, 87 possibly extinct fish species, and six extinct in the wild fish species. [ 1 ] [ 2 ] Cartilaginous fish
The Kunimasu species was originally endemic to a single location, Lake Tazawa in Akita Prefecture, Japan. [2] In 1935, eyed eggs (a fertilized stage of eggs) of this fish species were introduced into several other lakes in Japan, including Lake Saiko, Yamanashi Prefecture, in an attempt at translocation that was thought to have been unsuccessful. [2]
The dugong (dugong dugon) VU VU at a global level on the IUCN Red List, CR on the Japanese Red List; [2] those found in the waters around northern Okinawa Island comprise the northernmost population globally [9] and are protected as a Natural Monument under the 1950 Law for the Protection of Cultural Properties [10]
Two coelacanths were initially reported captured off Songo Mnara, a small island off the edge of the Indian Ocean in August 2003. A spate of 19 more specimens of these extremely rare fishes weighing between 25 and 80 kg were reported netted in the space of the next five months, with another specimen captured in January 2005.
Sacabambaspis is an extinct genus of jawless fish that lived in the Ordovician period. Sacabambaspis lived in shallow waters on the continental margins of Gondwana . [ 1 ] It is the best known arandaspid with many specimens known.
Takifugu chinensis, the Chinese puffer, is a species of fish in the family Tetraodontidae (pufferfish) that is found in coastal waters of China, Japan and Korea. [1] This critically endangered pufferfish has drastically declined because of overfishing and habitat loss, but it is possibly also threatened by the widespread release/escape of aquacultured Takifugu rubripes within its range.