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meerkat18
There are THREE (3) phyla or categories of fish.

These phyla are:
1) Agnatha - jawless fish ; around 50 species in the world
2) Chrondrichthyes - cartilaginous fish ; around 600 species in the world
3) Osteichthyes - bony fish (divided into ray finned group and lobe finned group) ; around 30,000 species in the world. 
 
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Answer:

3

Explanation:

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