Michelle has it right.The protocol is to stay close to the bottom or a wall/reef if you can until they pass, then get out of the water ASAP. Funny looking divers with all the gear and blowing bubbles aren't on their menu but if you look enough like a seal on the surface, then you might become a case of mistaken identity.
.
Beach divers: hug the bottom all the way in. Heck, your might even see something
interesting in the sand.
Boat divers:
Learn to navigate so you can find the boat.
Learn to take your BC and fins off underwater. I dive a small boat where you gotta
take your BC and fins off to get on the boat. If the Landlord is hanging around, I'm
gonna clip off the camera (tag line is at 15'), take off the BC (I may do this on the
bottom), clip off the BC, but keep one stap in an elbow, take off fins, head for the
ladder, and into the boat.
Yes, I've dived the Farallones.