Went to the bridge for diving yesterday and today. Not realizing yesterday was a holiday I was a little surprised at the amount of people there for an 0800 hightide on a Monday. Today hightide was at 0859 and there about half as many people. Visibility yesterday was 20ft, with a 74f sea temp. Today visibility was 30ft with a sea temp 75f. Did REEF surveys on both days. While assiduously searching for Dwarf Frogfish and not finding any, I did manage a new observation anyway. Spotted a small crab underneath a clam shell. Flipped the shell over and the crab stayed tight against the shell. It is called a Granulate Shellback Crab. Relying on half a bivalve shell as opposed to hermit crab MO of relying on a univalve shell. Also observed a Five-Slotted Sand Dollar test the size of a penny. The most common sand dollars found at BHB are Six-Keyhole Sand Dollars, had not observed a Five-Slotted until today. Respectively, Barbfish, Phoronopsis californica, Blue Hamlet, Five-Slotted Sand Dollar, Frillfin Goby, Granulate Shellback Crab, Pregnant Lined Seahorse, Sheepshead, Granulate Shellback Crab Video, Lionfish Video, and Atlantic Longarm Octopus Video.