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Guest
Guest
This might sound silly, but I never thought about this until I installed moon lights on my 55 gal tank. I was watching my fish, and they were just as active as in the day and I wondered if they ever slept. I know the clown loaches might when they hide in their caves, and the cats just rest on the bottom, but the tetra's and danio's always seem to be on the move. Do fish ever sleep?