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4. Most have scales on their body except cattle fish.

5. They have fins for swimming and protection

6. They are cold blooded vertebrates

7. They feed on plants and animals in water.

The structure of the fish and function of each part of the fish

Dorsal fin

Lateral line
Gill cover — Caudal fin
(operculum) SI
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Mouth
* •

Eye- Anal fin
>

Anal spines

Pelvic fin

Pectoral fin-

There are three major types or classes of fish:

1. Lungfish

2. cartilaginous

3. bony fish.