Sex and the seahorse (site broke the link so I removed the link - poor usability):
Unlike the sex roles in the vast majority of animals, the male seahorse looks after the fertilised eggs in a special brood sac on the front of his abdomen, which works much like the womb of a female mammal. The fertilised eggs get embedded into the wall of the pouch and are bathed in a fluid that provides nutrients and oxygen. In effect, the male seahorse becomes pregnant and gives birth to live offspring - the only male in the animal kingdom to do so.
Related: Seahorse podcast (mp3 - NPR Our Ocean World) - Kingdom of the Seahorse (NOVA)
May 23rd, 2007 at 6:39 pm
“A team of American and Irish researchers have discovered that some female sharks can reproduce without having sex, the first time that scientists have found the unusual capacity in such an ancient vertebrate species…”
November 9th, 2007 at 6:52 pm
“It’s the only vertebrate known to naturally self-fertilize, for example. In some populations, it can become a hermaphrodite, developing both male and female parts simultaneously, to produce clones of itself…”
November 10th, 2007 at 5:22 pm
This is sort of true. Some species of male pipefish carry their eggs in a fully developed pouch. Pipehorses, which are the evolutionary middle ground also have a pouch which carries eggs. Most species of sygnathiformes, (seahorse and family) the male carries the eggs in some way. Sea Dragons have a spongy area at the base of the tail that the males carry the eggs until they hatch.