Description: A hydroid colony living on a riser at the Heather Alpha platform in the North Sea Item Type: Image Title: Colony of hydroids in the North Sea Species: Tubularia larynx Behaviour: Living on riser Site: Atlantic -- North SeaNorth Sea Site Description: Seafloor Depth (m): approx 40 Countries: UK -- North Sea Habitat: Temperate Rig: Heather Alpha Project Partners: Rovtech, Lundin Petroleum, iicorr Deposited By: Rob Curry Deposited On: 24 May 2007