This Bizarre Fish Has 8 Rows of Forehead Teeth It Uses During Sex
Spotted ratfish are scaleless, rabbit-faced deep-sea fish, about two feet (61 centimeters) long, and native to the northeastern Pacific Ocean. As if that wasn’t a strange enough description, these distant shark cousins also feature teeth on their foreheads. While a number of marine animals, such as sharks, rays, and whale sharks, have external tooth-like structures called denticles, it turns out the spotted ratfish’s toothy features are straight-up true teeth, as true as the ones in your mouth.