So, to give you a brief overview of how new I am, I was extremely concerned for the health of my clownfish because they appeared to be having a seizure. after googling I realized I was just an idiot. however, I have noticed a different behaviour and wanted to know if anyone out there might know if this is normal. I purchased two clownfish, and cycled the tank with them. my numbers are amazing right now, (ammonia 0, Nitrite 0, Nitrate 20) but I've noticed a change in behaviour over the week and a half I've had these little guys and want to make sure this is normal. the first few days they were skittish and never stopped moving around the tank. as they settled in, I noticed they preferred one side of the tank to the other, (actually it seems all my critters do too (hermit crab, cleaner shrimp, 4 nassarius snail, and 2 banded trochus snails, although to be frank, the trochus snails found the one live rock with algae on it and haven't moved since, just happens to be on the side the others like too). what seems really odd to me coming from fresh water tanks is every morning when I turn on the lights I have a mini heart attack because my clowns are just sitting in the bottom corner by the heater not moving at all, almost snuggling each other in various odd positions. after a few minutes they resume daily activities, but I was concerned about this behaviour. is this just how they sleep, lying on the bottom of the tank? or is something off? I'm used to fish sleeping in their preferred level of the water column, but the clowns seems to spend most of their day in mid-upper level but then curl up and sleep on the bottom of the tank.