The rockhead poacher is a little fish with a big pit in its head. The divot may be like a drum, making sound that rises above ...

A cavity in the middle of the rockhead poacher’s skull might be used like a maraca to produce sound, new research suggests.

(CNN) — Hundreds of millions of years ago, jawless fishes swam Earth’s seas, their brains protected on the outside by armored skin, and on the inside by plates made of cartilage. Scientists are still ...

Scientists are studying a unique fish called the rockhead poacher. This small fish has a strange hollow in its skull. New ...

A fossil found by a pair of hikers last year has turned out to be the skull of a huge new species of prehistoric fish that lived around 72 million years ago. The hikers came across the fossil in ...

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