A close-up view of the feathery tentacles of this filter feeding worm, often referred to by the generic name of Keel Worm. Its Latin name is Pomatoceros triqueter and it is extremely common in all rocky areas of Britain's coastline where it can be found with its calcareous tube adhering to virtually any hard surface. In the photograph it has established itself on an area of encrusting red algae which itself has grown over a section of bedrock. It is a very successful animal as its hard tube appears to be resistant to the browsing activities of other animals such as sea urchins.

A close-up view of the feathery tentacles of this filter feeding worm, often referred to by the generic name of Keel Worm. Its Latin name is Pomatoceros triqueter and it is extremely common in all rocky areas of Britain's coastline where it can be found with its calcareous tube adhering to virtually any hard surface. In the photograph it has established itself on an area of encrusting red algae which itself has grown over a section of bedrock. It is a very successful animal as its hard tube appears to be resistant to the browsing activities of other animals such as sea urchins.