Big-bellied seahorses are ovoviviparous, which means females transfer eggs to males, who then fertilize and carry the eggs until they hatch Kelli Bender is the Pets Editor at PEOPLE. She has been ...

Meet these animal dads who prove their dedication, strength, sacrifice and ensure their babies survive challenges nature constantly throws against them.

Rog Hanson isn’t a scientist, but he’s likely spent more time with Pacific seahorses than anyone else. He built them a secret ...

What are some animals that give birth to huge numbers of offspring at once?” (Watch a female sea urchin produce millions of eggs.) The mola, or ocean sunfish, looks like an animal cracker someone bit ...

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