is catfish a cartilaginous fish
Their upper jaw is instead formed from a cartilagenous bar that is not homologous with the bone found in other vertebrates. The electric rays are cartilaginous fishes comprising the order Torpediniformes. There are about 69 species of these rays. The fish is named so for its all-black color except for a white blaze on the nose and two white rings on the tail. In most of the ray-finned fish the sacs evolved into closed off gas bladders, while a number of carp, trout, herring, catfish, and eels have retained the physostome condition with the sac being open to the esophagus. Bony fishes form a taxonomic group called Osteichthyes. They have skeletons made of bone, and can be contrasted with cartilaginous fishes which have skeletons made of cartilage.Bony fishes are divided into ray-finned and lobe-finned fish.Most fish are ray-finned, an extremely diverse and abundant group consisting of over 30,000 species. These outpocketings first arose in the bony fish. Some fish have permanently protruding upper jawbones called rostrums. Billfish (marlin, swordfish and sailfish) use rostrums (bills) to slash and stun prey. Cartilaginous fish, such as sharks and rays also lack a true maxilla. In all locations and during all time periods, catfish were the most abundant non-kosher fish, followed by cartilaginous fish — sharks and rays — … The fish is scale-less and grows to attain a maximum length of about 50 cm.
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