At around 35m deep the bedrock-slopes give way to narrow bands of boulders embedded in sediments and loose cobbles, which may be tumbled around during winter storms.

Dahlia anemones and solitary sea squirts colonise crevices where edible crabs wedge themselves. Large spiny starfish slowly glide over the boulders, under which lobsters and curled octopus lurk. Beyond 40m open expanses of fine mud and sand blanket the seabed. Stands of sea pens are scattered between the entrances of prawn (Nephrops) burrows, which dimple the surface of these soft sediments.

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