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Sponges do not give birth. The only animals who give birth to live young are mammals. Sponges reproduce by releasing sperm or eggs into the sea. The sperm and eggs just mix up in the water and form tiny sponges. The "babies" float around until they land, where they grow into new sponges. Some sponges can also form a "bud" that grows into a new sponge without any sex involved.

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17y ago

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