Preview Solitary Hydroid (Tubularia indivisa), very clear view of single polyp head with black background, St Abbs, Scotland, UK North Sea Image ID: 970-380 Artist: Lawson Wood Purchase a commercial license Buy framed prints & more from our print store underwater solitary hydroid tubularia indivisa polyp head polyp coral coral corals coral reef st abbs scotland uk united kingdom close up close ups close ups close up north sea