http://www.petsanimalsworld.com closer to the animal world Tue, 06 Mar 2007 04:56:15 +0000 en hourly 1 http://wordpress.org/?v=3.1.2 http://www.petsanimalsworld.com/fishes/fish-an-introduction/ http://www.petsanimalsworld.com/fishes/fish-an-introduction/#comments Tue, 25 Jul 2006 15:12:31 +0000 admin http://www.petsanimalsworld.com/fishes/fish-an-introduction/ Fishes are water-dwelling vertebrates with gills. Most are cold-blooded. There are over 29,000 species of fish, making them the most diverse group of vertebrates. Fish come in different sizes, from the 16 m (51 ft) whale shark to a 8 mm (just over ¼ of an inch) long stout infantfish. Other sea dwelling creatures, like dolphins, while closely resembling fish in outer appearance, are actually mammals.

 

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