From colorful displays to aggressive fights, mating rituals vary widely across the animal kingdom. But one of the strangest comes from male ghost sharks – also known as chimaeras – who use their teeth ...

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 ...

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