I wouldn't worry about it as long as he is swimming and eating fine. It's freaky at first. I had a 3' zebra moray that had an 'off' day once and I almost fainted at seeing my prize black and white eel looking like a prize grey and white eel. He recovered from it within a few hours, guess the crayfish he got for dinner gave him indigestion.LOL
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55gal,216 watt Tek T5, 45#LR, 45#LS, 3 maxi-jet 900's on a natural wavemaker timer,phosban reactor, 5 gal fuge (built out of standard 10 gallon tank) with chaeto and feather caulerpa, sealife systems protein skimmer, wet/dry, 3 blue/green chromi, 1 skunk cleaner shrimp, 1 coral beauty,1 scopas tang, 2 false percs, 5 mexican turbo snails, assorted dwarf blue leg hermits, astrea snails, and nerite snails |