Male seahorses are famously active dads, even taking on the role of egg incubator. Females deposit unfertilized eggs into a pouch
on the male's belly. He fertilizes and protects these eggs for several weeks and then gives birth to anywhere from 5 to 1,500 hatchlings (usually around 200 for most species). Then it's bon voyage to the small fry, as seahorses do not nurture their young.