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[[Sharks]] are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral f ..." originally meant "villain" in English. The term was later applied to the fish due to their predatory behavior. The term is derived from the German "Schur

== Fish == ...during the [[Cambrian explosion]], around 530 million years ago. The term "fish" is used to describe a diverse range of water-dwelling creatures, including

...nced: /ɪˈlæzməˌbræŋk/) is a term used to describe a group of cartilaginous fish, including sharks, rays, and skates. The term is derived from the Greek wor ...y their cartilaginous skeletons, as opposed to the bony skeletons of other fish. They also have five to seven gill slits on each side of their bodies, and

...', is a class of the [[phylum]] [[Chordata]] that includes the majority of fish species. ...rs to the characteristic bony or spiny rays that support the fins of these fish.

...is a term used to describe a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral f Sharks are a group of elasmobranch fish, which also includes [[rays]] and [[skates]]. They are further classified i

'''Stingray''' (/ˈstɪŋˌreɪ/) is a group of sea rays, which are cartilaginous fish related to [[sharks]]. They are classified in the suborder Myliobatoidei of * [[Cartilaginous Fish]]: A group of fish that includes sharks, rays, and skates. They are characterized by their ske

...''elasmobranchs''', are a subclass of [[Chondrichthyes]], or cartilaginous fish, that includes the [[sharks]] and the [[rays]] and [[skates]], and sawfish. Elasmobranchs are characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral f

...at have bony, as opposed to cartilaginous, skeletons. The vast majority of fish are members of Osteichthyes, which is an extremely diverse and abundant gro ..." is derived from the Greek "osteon," meaning bone, and "ichthys," meaning fish.

...d on the backs of various marine and freshwater vertebrates including most fish, certain species of dolphins, and whales. .... In most cases, it consists of a thin, flat structure composed of bony or cartilaginous spines (''rays'') covered by skin and, in some cases, scales. The number, s

...ing cartilage and "ichthys" meaning fish, referring to the fact that these fish have skeletons made of cartilage rather than bone. ...(ἰχθύς), meaning "fish". This refers to the unique characteristic of these fish, which have skeletons made entirely of cartilage rather than bone.

...onounced: mix-ee-nee), also known as '''hagfish''', are a class of jawless fish, the only known living animals that have a skull but no vertebral column. Myxini are known for their unique anatomy. They possess a cartilaginous skull and tooth-like structures composed of keratin. Unlike other vertebrat

'''Agnatha''' (pronunciation: /æɡˈneɪθə/) is a superclass of jawless fish in the phylum [[Chordata]]. The term is derived from the Greek words 'a' me ...haracterized by the absence of a jaw, paired fins, and scales. They have a cartilaginous skeleton and a notochord that persists throughout their life. The heart is

...used in the field of [[Biology]] to refer to a group of [[Agnatha|jawless fish]], which includes the [[Lampreys|lamprey]] and [[Hagfish|hagfish]]. The ter ...jaws, and the presence of a single nostril. They are also known for their cartilaginous skeleton and the absence of paired fins. Cyclostomes are further divided in

...ish), [[Actinopterygii]] (ray-finned fish), [[Sarcopterygii]] (lobe-finned fish), [[Amphibia]] (amphibians), [[Reptilia]] (reptiles), [[Aves]] (birds), and

...believed to have originated from the practice of fishermen using scraps of fish (their "chums") as bait. The term was then adopted by the medical research ...rs to the substance used to attract the animals. This can be anything from fish scraps to specially formulated chemical attractants.

...e skeletons primarily composed of bone tissue, as opposed to cartilaginous fish, which have skeletons made of cartilage. * [[Cartilaginous joint]]: A type of joint where the bones are entirely joined by cartilage,