i have an 8 inch albino oscar in a 50 gallon tank at the moment. this morning when i was watching him i noticed some small black dots on his body that seem to move around very easily. they dont stay in one spot very long and they very obviously crawl across him. i added some salt and raised the temperature to 84 and that has seemed to help but im still extremely curious as to what these lil devils are. anyone had them before?