How do fish have sex?

Answers:
They dont have sex like human's do or other animals. Fish reproduce by external fertilization . The female lays the eggs then the male sperm over them, to fertilize them. If you have an old Biology book lying around just look up external fertilization %26 it will describe the organisms which do this.

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No they mate!

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They pop in a cd from that band in ariel... lol no my sharks have claspers that he uses to hold on and they mate like that. Then THESE sharks lay eggs that will hatch some sharks however will give live birth like whales and dolphins.