Shark

Hexanchiformes

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Squaliformes

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Pristiophoriformes

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Squatiniformes

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Heterodontiformes

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Orectolobiformes

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Carcharhiniformes

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Lamniformes

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Sharks are a group (superorder Selachimorpha) of fish, with a full cartilaginous skeleton, a streamlined body plan with between 5 and 7 gill slits along the sides (most often) or side of the head (the first modified slit is behind the eye and called a spiracle), dermal denticles covering the body to protect from parasites, and rows of replaceable teeth in the mouth.

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Superorder: REDIRECT Order (biology)...

Fish: : This page is about the animals. For other meanings, please see Fish (disambiguation)....

Cartilaginous: REDIRECT Cartilage...

Shark related Images and Photos (experimental)

Shark	Shark Fin	Shark Tale	Shark Tale
Shark Tale	"Shark Week ""Lemon Shark"" Poster"	Shark Fin Cove	Tiger Shark (DVD)
Shark Plush Toy	Shark Week Towel	"Shark Week ""Shark Splash"" T-Shirt - Black"	"Shark Week ""Open Wide"" Poster"