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Cartilaginous fishes include sharks, rays, skates, and shovelnose rays. The majority of the order Rhinopristiformes, which includes sawfish, guitarfish, wedgefish, and other shovelnose rays, is considered critically endangered, with 28 of its 64 evaluated species considered critically endangered by the IUCN.
The meteor goldfish is considered the rarest breed of goldfish. They are a tailless form thought to have been developed by goldfish breeders during the late 19th or early 20th century. [1] [2] [3] The meteor goldfish lack a tail fin, but have a well-developed anal fin in its position. [4]
[4] [5] She was first mentioned in the San Francisco Chronicle in 1947. [6] She was joined by another lungfish, named after Herb Caen, in 1952 [7] [8] or 1958. [2] She was given the name Methuselah by Steinhart Aquarium director John McCosker in 1988 after spending 50 years at the aquarium. [9]
Approximately 0.3 m (0.98 ft) deep on one end of Devils Hole is a small rock shelf of 3.5 by 5 m (11 by 16 ft). The dissolved oxygen of the water is 2.5–3.0 ppm up to around 22 m (72 ft) in depth, though the shallow shelf can have dissolved oxygen levels as high as 6.0–7.0 ppm in June and July.
On 14 May 2020, a 30 kg specimen was found floating in the river in Angkor Wat area, Krovanh village, Sangkat Norkor Thom, Siem Reap, Cambodia; the locals said it was a rare fish, and not commonly seen in this area. With catch-and-release after the fish is landed, it must be held for 5 minutes until it takes a breath.
Caviar from Iran is exempted from the ban. Iran is considered by CITES to practise effective conservation and policing of its fisheries. [5] In January 2007, this ban was partly lifted, allowing the sale of 96 tons of caviar, 15 percent below the official 2005 level. [6]
Formerly considered rare, the species is now suspected to be relatively common, although sightings of healthy specimens in their natural habitat are unusual. [26] The giant oarfish, and the related R. russelii, are sometimes known as "earthquake fish" because they are popularly believed to surface before and after an earthquake. [30] [31]
Coregonus vandesius, the vendace / ˈ v ɛ n d eɪ s /, is a freshwater whitefish found in the United Kingdom.Population surveys since the 1960s have revealed a steady decline and the fish is no longer present in some of its previous haunts but is still present in Bassenthwaite Lake and Derwent Water.