Thursday, May 24, 2012

What is a fish? Part 1

What is a fish?

This might seem like a simple question, but when we consider characteristics that might be used to categorize fish, we find exceptions to every rule.

For example: Fish are aquatic.

We think of fish as aquatic organisms, but there are many fish that are adapted to survive out of water for considerable periods of time. Here are a couple of great examples, the mudskipper and the climbing perch.


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