Here are six fascinating animals where only the males give birth.

Male and female dusky pipefish look exactly the same in all but one aspect—males have a pouch for incubating eggs when they ...

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.