That was an emerald crab, Mithrax sculptus. Most will eat nori if offered; his first taste was from some scraps we gave to our starry blenny. After that we started feeding him nori once a week as he had cleaned the tank of bubble algae, but it wasn't enough and he starved to death (by my guess).
Lighting is 4x54W T5: 2x ATI Blue+, 1x UVL AquaSun, 1x UVL Super Actinic. I adjusted the color in PS, what you see is the actual color of our tank. The camera is a Panasonic DMC-LZ1 believe it or not, just set on 'macro' mode with low iso and a nice steady tripod.
Marty
Lighting is 4x54W T5: 2x ATI Blue+, 1x UVL AquaSun, 1x UVL Super Actinic. I adjusted the color in PS, what you see is the actual color of our tank. The camera is a Panasonic DMC-LZ1 believe it or not, just set on 'macro' mode with low iso and a nice steady tripod.
Marty