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What are sharks?

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Isaacr | 08:56 Mon 28th May 2001 | Animals & Nature
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I read recently that sharks aren't fish, why not?
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Avatar Image rekstout
They do not have several of the adaptations that fish have. The main one is that they do not have a bone structure but have an internal sturcture made of cartilage which is softer. I believe that they also hove no swim bladder or scales. They belong to the same family as rays.
23:12 Wed 30th May 2001
Avatar Image sabrinah
Have a look at: article 1105
19:58 Mon 04th Jun 2001
Avatar Image sharkey
they are fish, but they just don't have a boney skeleton like most fish do. they have cartiligonous (spelling) skeletons like rays
10:10 Fri 04th Oct 2002
Avatar Image Kozmic Blues
What I have read so far is that, everything with gills is classified a fish, and everything with lungs is classified mammal.

*Kozmic*
18:02 Fri 01st Dec 2006

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