The discovery proves it's possible for vertebrates to grow teeth outside the mouth Getty A new study discovered male ghost sharks grow teeth out of their foreheads on an appendage called a tenaculum ...

A recent study suggests that male ghost sharks, also known as chimaeras, use an unusual organ for mating – sharp teeth that grow out on their foreheads. Unlike other sharks and rays, ghost sharks do ...

Male "ghost sharks"—eerie deep-sea fish known as chimaeras that are related to sharks and rays—have a strange rod jutting from their foreheads, studded with sharp, retractable teeth. New research ...

There’s a lot of diversity of form among fishes. What we generally think of as standard features (fins, scales and teeth) can present in all sorts of interesting ways from group to group and species ...

CT (computed tomography) scan of the adult male Spotted Ratfish frontal clasper (Tenaculum) covered in rows of teeth (rainbow colors). Male “ghost sharks” — eerie deep-sea fish known as chimaeras that ...