This page is preserved as archival content and is no longer receiving updates.

Otolith prepared for ageing

How old is that fish?

Did you know?
Scientists can tell how old a fish from its ear bone!

Just like tree rings, a fish's ear bone (otolith) has rings that reflect its age. Check out the two methods scientists use to see the rings in otoliths, break and burn or thin-sectioning

Test your age reading ability by playing this interactive game.