Head-Butting Reef Fish Fight Over Sex Scientists diving in the North Pacific were jarred when they heard mysterious sounds like spear guns being fired. The jolting noises turned out to be never-before ...

Trespassers on the mating grounds of male bumphead parrotfish soon learn a hard lesson. The reef-munching fish fend off competing males using aggressive headbutting — a form of behaviour that has ...

First sighting of ramming behaviour in bumphead parrotfish during competition for females. Trespassers on the mating grounds of male bumphead parrotfish soon learn a hard lesson. The reef-munching ...

Scientists diving in the North Pacific were jarred when they heard mysterious sounds like spear guns being fired. The jolting noises turned out to be never-before-seen (or heard) head-butting bouts ...