Saccharina latissima, the sugar kelp, is a brown algae found in the intertidal and shallow subtidal, with a circumboreal distribution. It is characteristic of intermittently disturbed areas. http://www.seaweed.ie/descriptions/saccharina_latissima.php
Guiry, MD. (2016). Saccharina latissima (Linnaeus) J.V. Lamouroux. The Seaweed Site. [cited June 2016]. Available from: http://www.seaweed.ie/descriptions/saccharina_latissima.php