English: high energy circalittoral rock
Welsh: craig isforlan ddofn egni uchel 
Subject: Amgylchedd
Welsh definition: Circalittoral rock is present all around the coast of the United Kingdom, and is characterised by animal dominated communities (a departure from the algae dominated communities in the infralittoral zone). This habitat complex occurs on extremely wave-exposed to exposed circalittoral bedrock and boulders subject to tidal streams ranging from strong to very strong.
Notes: Term o system ddosbarthu EUNIS o gynefinoedd morol. CR.HCR. yw’r Cod Cynefin. Mae’r Cyd-bwyllgor Cadwraeth Natur yn defnyddio system arall o gategoreiddio cynefinoedd morol, yn seiliedig ar system ddosbarthu EUNIS. Yn y drefn honno “high energy deeper water rock” yw’r term cyfatebol.