The spiny dogfish, beloved of vertebrate-anatomy instructors everywhere. This is the first Friday Fish to wander outside of Class Actinopterygii, the ray-finned fish - today, we're looking at a shark, Class Chondrichthyes, Superorder Selachimorpha. So no bones here, just lots of cartilage and interesting sharp pointy teeth.It should be pretty obvious where I stole this picture from.
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