Looser gets pregnant

[00:00:01]These animals settle arguments with a sword fight. The loser gets pregnant.

[00:00:07]Both are male and female at the same time.

[00:00:11]But neither wants the cost of carrying eggs.

[00:00:15]They fence using reproductive organs.

[00:00:19]The first one pierced becomes the egg carrier.

[00:00:23]In the ocean, even reproduction can become a competition.

[00:00:27]Nature doesn't care what's fair, only what works.