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

But, the captivating pipefish dares to break these established rules. They are called pipefish because they look like, well, pipes – long and skinny. These marine creatures are basically slimmer ...

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.