Search results
Results from the WOW.Com Content Network
Stingray species are progressively becoming threatened or vulnerable to extinction, particularly as the consequence of unregulated fishing. [5] As of 2013, 45 species have been listed as vulnerable or endangered by the IUCN. The status of some other species is poorly known, leading to their being listed as data deficient. [citation needed]
Batomorphi is a division [2] of cartilaginous fishes, commonly known as rays, this taxon is also known as the superorder Batoidea, but the 5th edition of Fishes of the World classifies it as the division Batomorphi. [3]
In most oviparous shark species, an egg case with the consistency of leather protects the developing embryo(s). These cases may be corkscrewed into crevices for protection. The egg case is commonly called a mermaid's purse. Oviparous sharks include the horn shark, catshark, Port Jackson shark, and swellshark. [83] [85]
The first shark-like chondrichthyans appeared in the oceans 400 million years ago, [1] developing into the crown group of sharks by the Early Jurassic. [2] Listed below are extant species of shark. Sharks are spread across 556 described and 23 undescribed species in eight orders. The families and genera within the orders are listed in ...
The tiger shark preys on Rhina ancylostoma. Rhina ancylostoma is a strong swimmer that propels itself with its tail like a shark. It is more active at night and is not known to be territorial. [20] This species feeds mainly on demersal bony fishes such as croakers and crustaceans such as crabs and shrimp; bivalves and cephalopods are also ...
Numerous species of sharks, such as the tiger shark (Galeocerdo cuvier) and the bull shark (Carcharhinas leucas), are major predators of the Atlantic stingray. In freshwater habitats, they may be preyed upon by American alligators (Alligator mississippiensis).
Charlotte, the stingray that for a time was mysteriously pregnant, has died, according to the Aquarium & Shark Lab by Team ECCO in Hendersonville, North Carolina.
Camouflaged porcupine ray. Myliobatiformes (/ m ɪ l i ˈ ɒ b ə t ɪ f ɔːr m iː z /) is one of the four orders of batoids, cartilaginous fishes related to sharks. [2] [3] They were formerly included in the order Rajiformes, but more recent phylogenetic studies have shown the myliobatiforms to be a monophyletic group, and its more derived members evolved their highly flattened shapes ...