Big Rock is a pinnacle from 3-45m. This scenic site is best dived on the South Eastern tip. It is covered with plumose anenomes and many other filter feeders. There is a lot of macro life to be found here, including carpets of brittlestars, with nudibranchs and sea hares. This is a great dive for scallops which are plentiful on the northern plateau, and makes an ideal last dive on the return journey to Ardrishaig or Lochgair.