A fish is an animal which lives and breathes in water. All fish are vertebrates (have a backbone) and most breathe through gills and have fins and scales. Fish make up about half of all vertebrate species and have been on the earth for more than 500 million years, even before the dinosaurs!!
There are more than 25,000 known species of fish and are divided into three main groups..... "Jawless" like this fish.....
He's not very beautiful, is he? And he doesn't really look like a fish, does he? The next group of fish is called "cartilaginous", and they look like this one....
and finally there are "bony" fish like this one .....
Fish are cold-blooded, which means their internal body temperature changes as the surrounding temperature changes. 40% of all fish live in fresh water. Some fish like sharks, must swim continually or rest on the bottom of the ocean.
Some fish can fly like these ones ....
and others can climb rock like these ones.....
Fish eat other fish, fish eggs, mollusks, aquatic plants, algae, zooplankton, insects, turtles and frogs.
Now... would you like to make a really special fish like this one.....
Click on this link.... they're really easy to make
So... today we've learnt lots about our fishy friends. Tomorrow we're going to discover the final group of vertebrates..... do you know which group it is.... Try and guess, I'll give you a clue
The clue is not the bird!!
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