A fun little dive site. If you can catch it on the right day, passing through the crevice is incredible. However, don't go through if the surge kicks up. The surge can be strong and the vis drops quick so it's just a better idea to turn around and go back the way you came. Don't worry, there is more stuff to see. Plenty of garibaldi, urchin, and mussel shells. Entry and exit is easy if you time the waves.