Please,please,please - check your currents. This dive can be many things. A snorkeler can enjoy the reef around the opening of the bay. A beginning or intermediate diver can enjoy the region around the west end of the head. Advanced divers who are willing to swim can experience the wall off the west end of Northwest Island. What you will see depends greatly on the weather. The western exposure causes severe storm damage. Hit it when the conditions are right and you can see anything that exists in Northwest waters. My last time through there on my boat I saw harbor seals, Dall's porpoise, and a pod of Orca.