Keelworm tubes

Keelworm tubes

Observation - Keelworm tubes - UK and Ireland. Description: Calcareous tubes attached to boulder exposed on low spring tide. Has to be Pomatoceros sp. and I think the the side ridges make this P. lamarcki rather than the less common, deeper living P. triqueter.

Calcareous tubes attached to boulder exposed on low spring tide. Has to be Pomatoceros sp. and I think the the side ridges make this P. lamarcki rather than the less common, deeper living P. triqueter.