Fish

Are you looking for?
 * Freshwater fish
 * Saltwater fish

A fish is a water-dwelling vertebrate with gills. Most are cold-blooded. There are over 29,000 species of fish through out the world, making them the most diverse group of vertebrates.


 * Fish come in a huge range of sizes. From 51 feet (16m) to 0.24" (8mm).

Links

 * Wikipedia - Fish