This is a conservation site and is used for research by the nearby Dunstaffnage Marine Laboratory. A number of large conger eels and lobsters can be found in a crack near the bottom of the reef. Divers drop in at the small inlet and descend from 4 metres to 14 metres following the reef wall to the right. A ledge protrudes from the reef at 14 metres while the seabed continues down to 17 metres. In from the ledge a crack is found.
Visibility is usually good but silt can be disturbed.
The crack contains lobsters and conger eels. If approaching from a slight distance the congers can sometimes be seen well out of the crack but will retract back in if approached. Large lobsters can also been found in the crack. The seabed is formed of shale and sand and urchins and starfish are numerous. The site is tidal and best dived during slack or on a gentle ebb tide.