Search results
Results From The WOW.Com Content Network
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 have certain characteristics that would be desirable in an underwater unmanned vehicle. The nature of their movement makes them stable platforms to carry payloads . They tend to be incredibly efficient swimmers many pelagic ray species and even some benthic species undertake very long yearly migrations .
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 ...
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.
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 ]
During the Carboniferous, some ctenacanths would grow to sizes rivalling the modern great white shark with bodies in the region of 7 metres (23 ft) in length. [16] During the Carboniferous and Permian , the xenacanths were abundant in both freshwater and marine environments, and would continue to exist into the Triassic with reduced diversity ...
A 2016 publication found that Ptychodus are likely true sharks belonging to Selachimorpha, rather than hybodonts or batoids as previously thought. [ 10 ] [ 12 ] A 2024 study of a complete skeleton concluded that they belong to the Lamniformes (mackerel sharks).