ok to start, my chiclids have pretty much been normal for what i have read about there behaviour, but today i noticed that they had dug a hole in the cravel under a branch, and moved a small barrel decoration into the hole. now the chiclid that hangs out in that area, for the last week has been going up to the surface and splashing it with its tail, it will go back and forth maybe 5 times and then return to the bottom level of the aquarium. is this a mating ritual or just a fish being crazy?