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A fish (pl.: fish or fishes) is an aquatic, anamniotic, gill-bearing vertebrate animal with swimming fins and a hard skull, but lacking limbs with digits.Fish can be grouped into the more basal jawless fish and the more common jawed fish, the latter including all living cartilaginous and bony fish, as well as the extinct placoderms and acanthodians.
5b Other fish: Wels catfish (Silurus glanis) [179] date uncertain Europe: meat Captive-bred 5b Other fish: Iridescent shark (Pangasianodon hypophthalmus) and Mekong giant catfish (P. gigas) [180] date uncertain Southeast Asia: meat, pets Captive-bred 5b Other fish: Flathead grey mullet (Mugil cephalus) [181] date uncertain California, Colorado ...
The term "fish" describes any non-tetrapod chordate, (i.e., an animal with a backbone), that has gills throughout life and has limbs, if any, in the shape of fins. [8] Unlike groupings such as birds or mammals, fish are paraphyletic, since the tetrapod clade is within the clade of lobe-finned fishes. [9] [10]
These predatory fish can grow up to 1.8 m (5.9 ft) and 45.4 kg (100 lb). [99] [100] Killifish and allies (Cyprinodontiformes) The largest species in this relatively small-bodied order is the Pacific four-eyed fish (Anableps dowei), reaching a size of 34 cm (13 in) and 588 g (1.296 lb). [101] Ladyfish and allies (Elopiformes)
More than 99 percent of all species, amounting to over five billion species, [7] that ever lived on Earth are estimated to be extinct. [8] [9] Estimates on the number of Earth's current species range from 10 million to 14 million, [10] of which about 1.2 million have been documented and over 86 percent have not yet been described. [11]
In general, sharks swim ("cruise") at an average speed of 8 kilometres per hour (5.0 mph), but when feeding or attacking, the average shark can reach speeds upwards of 19 kilometres per hour (12 mph). The shortfin mako shark, the fastest shark and one of the fastest fish, can burst at speeds up to 50 kilometres per hour (31 mph). [87]
The state of California has taken steps to strengthen animal cruelty laws, including regulations involving farm animals. In 2018, California voters approved Proposition 12, which mandated more ...
An octopus (pl.: octopuses or octopodes [a]) is a soft-bodied, eight-limbed mollusc of the order Octopoda (/ ɒ k ˈ t ɒ p ə d ə /, ok-TOP-ə-də [3]).The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids.