The Janitorial Crew aka CUC, or "clean up crew". These critters generally eat all the tank pests...algae, detritus, parasites, and unwanted hitchhikers such as Aiptasia, a pest anemone. The Emerald Mithrax crab now has something white attached to it's leg. It appears to be some kind of shell?
Please click on a thumbnail for the date and a larger view [sorted most recent first]
Red Mithrax Crab
Amphipod
Amphipod
Emerald Mithrax Crab w/white growth?
Skunk Cleaner Shrimp
Blue Leg Hermit Crab
Emerald Mithrax Crab
Skunk Cleaner Shrimp on my finger
Red Mithrax Crab
Astrea Snail on Glass
Skunk Cleaner Shrimp
Red Mithrax Crab & Royal Gramma
Emerald Mithrax Crab
Blue Leg Hermit Crab
Harlequin Serpent Star
Red Mithrax Crab
Emerald Mithrax Crab & Astrea Snail
Frank training "Flower" and curious Clown
Nerite Snail & Scarlett Reef Hermit Crab
Scarlett Reef Hermit Crab
Cerith and Trochus Snails
Bumble Bee Snail
Scarlett Reef Hermit Crab, Trochus, and Nassarius Snails