Check out these Big-belly Seahorse fry that hatched at the Georgia Aquarium!
Seahorses are one of very few species where the male 'gives birth'. The female will deposit her eggs in a brood pouch located on her mate's belly, where he fertilizes them internally and carries them until they hatch. A single male may carry hundreds of eggs in his pouch.
When the fry hatch, they must gulp at air bubbles to fill up their swim bladder, an organ that allows them to control their buoyancy. Sometimes they gulp in a bit too much air. When this happens, they may float at the surface and be unable to feed. To help prevent 'floaters', these little guys live in a specially designed tank called a kreisel, which keeps water circulating gently so that they won't remain stuck at the surface. Aquarists also carefully string fishing line in the tank that the seahorses can grab onto with their prehensile tails. In their early days, the fry are fed tiny, live brine shrimp that are hatched at the aquarium.
Photo credit: Georgia Aquarium
The system that houses the seahorse fry can be seen during the Aquarium's behind-the-scenes tours. Georgia Aquarium breeds Big-belly Seahorses as ambassadors for their threatened habitats, coral reefs and seagrass beds, which are important marine ecosystems. This breeding effort allows the aquarium to display seahorses without taking them from the ocean, and also to donate seahorses to other aquariums.
See the aquarium's blog post for more.