I have a 12 gallon nanocube with a clown fish, firefish, sea ananome, cleaner shrimp, 3 crabs, and one turbo snail. I have just recenlty noticed that the cleaner shrimp is "poking" the clownfish. The clownfish is in the ananome and the cleaner shrimp goes up and starts to push him down. He only does this when the light is turned off, what is going on? Is this a normal behavoir? What should I do? Thanks for the help
