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The whale shark (Rhincodon typus) is a slow-moving, filter-feeding carpet shark and the largest known extant fish species. The largest confirmed individual had a length of 18.8 m (61.7 ft). [ 8 ] The whale shark holds many records for size in the animal kingdom, most notably being by far the most massive living non-cetacean animal.
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Other common names include bone shark, elephant shark, sailfish, and sunfish. In Orkney, it is called hoe-mother (contracted homer), meaning "the mother of the piked dogfish". [5] The basking shark is a cosmopolitan migratory species found in all the world's temperate oceans.
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Many sharks are apex predators and keystone species, meaning that they are at the top of their food chain and play a crucial role in maintaining the health of marine environments. [1] Sharks whose members cyclically and predictably move large distances are considered migratory and many pelagic (open ocean) shark species fall into this category.
Passive electroreception using ampullae is an ancestral trait in the vertebrates, meaning that it was present in their last common ancestor. [7] Ampullae of Lorenzini are present in cartilaginous fishes ( sharks , rays , and chimaeras ), lungfishes , bichirs , coelacanths , sturgeons , paddlefishes , aquatic salamanders , and caecilians .
Rhincodon typus; Rhoptropella spp. Rhyticeros spp. (Except the species included in Appendix I) Rieppeleon spp. Rupicapra pyrenaica ornata; Rupicola spp. Saara spp. Sacalia bealei; Sacalia quadriocellata; Saiga borealis; Saiga tatarica; Salvator spp. Sarkidiornis melanotos; Sarracenia spp. (Except the species included in Appendix I) Satranala ...
Ground sharks, like this blacknose shark, have a nictitating membrane which can be drawn over the eye to protect it.. Carcharhiniformes / k ɑːr k ə ˈ r aɪ n ɪ f ɔːr m iː z /, commonly known as ground sharks, are the largest order of sharks, with over 270 species.