Meet a Bargibanti pygmy seahorse.

The males are pregnant for about two weeks, after which they’re ready to go at it again. “He gives birth, and then half an hour later, he’s mating again,” says Smith. Judging from the pygmies he’s studied, H. bargibanti probably only lives about a year, so “basically their whole thing is just producing as many offspring as they can,” he says. When the fry emerge, they’re essentially miniaturized adults that immediately bid a seahorse sayonara, drifting off to eventually find a gorgonian home of their own.