maybee you should get your tank exorsised, phantoms in the water could be responsible. Maybee your tank has been build on the site of an ancient Indian burial ground, and slowly the sprits are minifesting themselfs as killer bivalves, that will eventually climb out and suck on your face pumping you with bivalval fluids creating a monster bivalve man. With his powers of bivalve, bivalve man strikes again, emptying the baths of unsuspecting pensioners with his incredible bivalve face.......
No but somtinmes I wonder if they are doing blood sacrifaces at the Colisuem up the street. Maybe thats it.No wait I was thinking of Tax time when I had to sell 5 gallons of blood to cover my taxes so the citycan keep there all might colisuem running. My they are smart fish .
I'm guessing you have a pair of clarkiis in your tank. Most people don't realize that one of the common names for amphipiron clarki is actually 'Cthulhu Clown'. These seemingly innocuous fish are, in actuality, depraved bloodthirsty worshippers of HP Lovecraft's semi-mythical Elder Gods.
Clarkis who are active participants in the debased blood-rites of Cthulhu are easy to spot, as these are the ones who develop darker pigmentation. The blacker the clown looks, the blacker the deeds it has committed.