In the underwater world, evolution often follows familiar rules: males compete, and females choose. But, the captivating pipefish dares to break these established rules. They are called pipefish ...

In pipefish, a remarkable species of fish, it's the males who get "pregnant." A recent study reveals how these fish defy evolutionary norms and adapt their biology to reversed reproductive roles.

Male pregnancy evolved in these species to increase reproductive success. By shifting gestation to males, females can produce ...