The seahorse is a very unique type of animal as it is the only one in the entire animal kingdom where the male gets pregnant instead of the usual female!
Sex role reversal involves the female competing for males as a mate. (where males usually fight for a girl in our daily lives) Male seahorses provide parental care for the young. While the young are in the pouch, males give oxygen through a capillary network, transfer nutrients, and change the atmosphere in the pouch.
*tick tick, isn't that like the placenta and umbilical cord in the human body system?* :D
The atmosphere change in the pouch makes it contain more salt water, so the young will be prepared to go into the ocean water when they are born.
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