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  • Cetacean surfacing behaviour - Wikipedia
    Porpoising, also known as running, [11] is a high speed surface behaviour of small cetaceans where long jumps are alternated with swimming close to the surface Despite the name, porpoising behaviour is seen in dolphins and porpoises, as well as other marine species such as penguins [12] and pinnipeds [13]
  • Horn Shark – Discover Fishes - Florida Museum
    In order, the crush its well-armored prey these sharks bite down with the highest known bite force relative to size of any shark Ranging from 95 to 200 N (Huber et al , 2005) The largest adults feed on the short-spined purple urchin , ( Strongylocentrotus purpuratus ) which stains their teeth and fin spines purple (Ebert, 2003)
  • Chondrichthyan - Cartilaginous, Sharks, Rays | Britannica
    Chondrichthyan - Cartilaginous, Sharks, Rays: The classification of chondrichthyans is a somewhat controversial subject Many sharks, skates, and rays are difficult subjects for taxonomic study The taxonomic review provides principal identifying characteristics of all major extant groups Class Chondrichthyes contains the subclasses Elasmobranchii (sharks and rays) and Holocephali (chimaeras
  • Oceans: Are sharks and rays threatened with extinction . . .
    Sharks and rays are more at risk of extinction than previously thought, with one-third of species threatened, according to a new study Of the 1,199 species of sharks and rays, 391 (32 5%) are classified in one of the three threatened categories The data shows that we may be seeing the end of their 420-million-year reign over the oceans
  • The Mysterious, Endangered River Sharks (Glyphis spp. )
    The Ganges Sharks is known only from freshwater habitats, but it may occur in brackish water as well; there are no marine records for this species The confused identity and lack of type locality of the Speartooth Shark preclude any statement about its preferred habitat; it is probably an inshore estuarine and possibly freshwater species
  • Shark Senses - The Shark Trust
    Many species of shark have brains as complex as those of mammals Enabling them to process a wide range of senses Sharks have the same 5 senses as we do but can also sense electrical currents and pressure changes
  • Is A Shark A Mammal Or A Fish? – A Case of Mistaken Identity
    Greenland Shark: One of the longest-lived vertebrates known, Greenland Sharks can live for hundreds of years They also have the slowest swim speed for its size across all fish species Orectolobiformes (Carpet Sharks) Whale Shark: The largest fish in the sea, Whale Sharks are filter feeders, consuming large quantities of plankton and small





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