What Protects Fishes From Diseases And From Other Animals , That Live In Water

What protects fishes from diseases and from other animals
That live in water

 

Mucus (slime coat) is a physical barrier that inhibits entry of disease organisms from the environment into the fish. It is also a chemical barrier because it contains enzymes (lysozymes) and antibodies (immunoglobulins) that can kill invading organisms.

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