Name: The reef at Cow and Calf at low tide on a calm day. Named "Cow and Calf" for the twin reefs just offshore which approach and sometimes break the surface, and which are reminiscent of a whale cow and calf. Depth: Maximum depth about 13 m on the sand. Marine life: There are a lot of gorgonian sea fans (Eunicella spp) at the base of the ridges, Higher up are Multicolour sea fans, and the tops are covered with Red bait. A variety of other sessile animals encrust the rocks among these zones, and there are various small seaweeds as well. Photography: Good photographic site for invertebrates Topography: Cow and Calf: The gap between reef and shore is about 5 to 8 m deep, with low ridges and boulders. The inner ridge of the reef breaks the surface at low tide, The outer face of this ridge drops to about 7 to 9 m, and the gap to the next reef is about that deep. The outer reef is very sheer on the seaward side, rising from 10m to very near the surface. The bottom slopes down gradually to sand at 12 m, with a narrow band of pebbles and small boulders. At the base of the ridge, it may be possible to see across the pebbles to the sand if the visibility is good, and the pebble zone tapers away to the south-west. These are rugged reefs of sandstone with quartzite veins. The bottom inshore of the ridges is rock and medium to small boulders with pebbles, sand and shell in crevices. The inner reef is about 33m from the shore and is about 35 m long. The outer reef is about 45 m off the shore and about 50 m long.