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Batoids are flat-bodied, and, like sharks, are cartilaginous fish, meaning they have a boneless skeleton made of a tough, elastic cartilage. Most batoids have five ventral slot-like body openings called gill slits that lead from the gills , but the Hexatrygonidae have six. [ 3 ]
Rajiformes / ˈ r æ dʒ ɪ f ɔːr m iː z / is one of the four orders in the clade Batomorphi, often referred to as the superorder Batoidea, flattened cartilaginous fishes related to sharks. [2] Rajiforms are distinguished by the presence of greatly enlarged pectoral fins , which reach as far forward as the sides of the head, with a generally ...
Batoids are a superorder of cartilaginous fish consisting of skates, rays and other fish all characterized by dorsoventrally flattened bodies and large pectoral fins fused to the head. This distinctive morphology has resulted in several unique forms of locomotion. Most Batoids exhibit median paired fin swimming, utilizing their enlarged ...
The shark hits the crocodile with the bump-and-bite technique. Accustomed to defending himself against rivals, the crocodile bites the shark's tail, but cannot get a good grip. The shark swims off and makes a wide turn for a full-on assault; all of a sudden, the crocodile gets the first bite on her right pectoral fin.
These are also often referred to as "sharks" in reference to their similar anatomy and ecology to modern sharks. The name Elasmobranchii comes from the Ancient Greek words elasmo- ("plate") and bránchia ("gill"), referring to the broad, flattened gills which are characteristic of these fishes.
Dailymotion is a French online video sharing platform owned by Canal+. Prior to 2024, the company was owned by Vivendi . [ 2 ] North American launch partners included Vice Media , Bloomberg , and Hearst Digital Media . [ 3 ]
79 living species of sharks have been featured in Shark Week, along with several species of batoids (rays and kin), chimaeras, and extinct forms. The most common species to be featured are great white sharks ( Carcharodon carcharias , 18.4% of episodes), tiger sharks ( Galeocerdo cuvier , 12.2%), bull sharks ( Carcharhinus leucas , 9.6%), and ...
Re-narrated Horizon episode, first aired in the UK in 1972. [4]We give you a behind-the-scenes look at the making of a nature film. Oxford Scientific Films Unit shows how it tackles such problems as filming a wood wasp laying its eggs inside trees, the hatching of a chick and the courtship rituals of the stickleback.