Why Do Fish Have Scales?
Fish have scales to protect their otherwise soft bodies. Scales are bony in structure and overlap each other. Scales have some versatility in them and can bend and slide over one another so that the fish can move.
LOOK AT THESE FISH
- Pinecone Fish :- This fish has large and thick scales that overlap each other to make it look like a pine cone.
- Porcupine Fish :-This fish raises its spines when an enemy approaches.
- Trunkfish :- This fish’s scale cover most parts of the body and is very hard. A trunkfish therefore can only move its eyes, mouth, fins and tail.
- Shark :- A shark has small pointed scales that are like teeth
Scales can show how old a fish is?
- Rings on every scale can tell us about a fish’s age.
Are there any fish that don’t have scales?
- The catfish and the lamprey do not have scales.
- Fish have two layers of skin. The epidermis, which is the outer layer, secretes mucus like substances that protects the fish’s skin from bacteria and fungi.
- The dermis forms the inner layer of its skin and is made of a tough bony material.
Things To Do
- Go with your mother to the fish market and closely observe how each fish’s scales are different from the other.
- Name 3 fishes which have colourful scales.
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