In the world of pipefish, which are cousins of sea horses, sexual selection may reverse in the most dramatic way yet recorded.
A Gulf pipefish embryo like this one develops inside dad, not mom. Jones
Biologists have most often talked about sexual selection as a force driving males to evolve lures for females. Now, Adam G. Jones from Oregon State University in Corvallis says the Gulf pipefish, Sygnatha scovelli, breaks the pattern.
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