Name: The name "York Shoal" is marked on the nautical charts of the area. Depth: Maximum depth is about 28 m at the edge of the adjacent shingle bottom (smallish loose rocks, usually rounded by the action of water), and the top of the reef is about 4 m. The average depth of a dive is likely to be about 18 to 20m m. Marine life: The shallower part of the reef is dominated by a heavy growth of red-bait ascidians, with patches of black mussel, quite probably the invasive Mediterranean mussel. Also, moderate numbers of sandy anemones, striped anemones and false plum anemones, and some gorgonian sea fans, which become more common at greater depths. Hottentot seabream and klipfish are fairly plentiful. Photography: Not a particularly scenic dive and visibility is unpredictable, so macro may be the best bet. Topography: The reef is hard sedimentary rock with strike roughly east-west and dips about 10 degrees to the north, consequently, the relief is mainly low flattish ridges and gullies, with no known steep or high dropoffs.