Great little Blenny, that swims similar to the E. bicolor, with same hiding maners.
The fish are a Reef Safe Blenny species, that will NOT do harm to SPS or LPS Corals. It eats primary only Algae, that it nips off the glass and rockworks.
P. fridmani has a clear black line through the eyes, and also completely purple fins aswell..
Pictichromis porphyrea is the answer.. Both are stunning small fishies :)