The cuttlefish has one of the largest brain-to-body size ratios of any invertebrate ... Water exits through a movable part called the funnel, which controls the angle of the spray.

To protect themselves, some invertebrates, such as snails, have shells. Others have a hard outer layer called an exoskeleton. The first part of this word ‘exo-‘ means outside, so an ...

This is a beginner's guide to the common groups of freshwater invertebrates found in Britain. It is designed to help you differentiate broad groups of common freshwater invertebrates, principally to ...

Freshwater invertebrates are an important part of the freshwater ecosystem and food chain, and they can also tell us a lot about the health of a waterbody. If you'd like to learn how to look for them, ...