Somerset’s sea has extensive areas of low reefs built by the Honeycomb Worm. These marine worms live in colonies of hundreds of thousands of individuals. Each worm, only 3-4 cm long, constructs a tube to live in from grains of sand. As the colony grows, they start to build their tube homes on top of each other creating significant structures on the sea floor.
These sand tube reefs may stand up to 30 cm high and cover hundreds of square metres. This reef habitat provides a home for of a wide range of other species including young fish, crabs, brittlestars and molluscs.
Honeycomb Worm reefs occur mainly in the sub tidal zone, i.e in the area always underwater, and are only occasionally exposed when the tide drops very low, and which are known as “spring tides”. The eastern end of Blue Anchor Bay is a good place to look for these reefs.