is he doing that gramma doing this also when the lights go off at night ?
i have a yellow tang thats been zipping back and forth the front glass then stops and shakes his tail in the sand then takes off... hes in my 90 gal. no signs of disease discoloration that i can see and eats like a hog , does it off and on during the day and at night as lights go out.. he goes in his hiding cave... i can not figure out it out either.
non of my other fish are doing this, (clown and 3 bangais)