I don't know if the cleaner wrasse was trying to sleep in the sand bed or not. I assumed that he was because other wrasses do. Yes, my sand bed is fairly coarse. It is possible that they injure themselves trying to bury. Hard to say.
The presence of the cleaner changed the fish behaviour a lot...and not only to my liking. The cleaning was interesting, but in order the get away from the cleaner the fish would dart suddenly away sometimes running into the tank walls.
That, combined with the little peck marks on the Naso....I don't think I'll miss him much.
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400 gal reef. Established April, 2007. 3 Sequence Dart, RM12-4 skimmer, 2 x OM4Ways, Yellow Tang, Maroon Clown (pair), Blonde Naso Tang, Vlamingi Tang, Foxface Rabbit, Unicorn Tang, 2 Pakistani Butterflies and a few coral gobies
My Tank: http://www.canreef.com/vbulletin/showthread.php?t=28436
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