When I put my hands in my tank my hand gets swarmed by my tiger barbs and then they start nipping at me. Doesn't hurt. Now my blue rams learned that behavior and are doing it too. First off can this harm me or my fish. Chance of infections? Not like I am putting in my hands when they are dirty or with open cuts. Second off are my fish doing this cause they think I am food, curious to see what I am, or are they defending their territory? Both the rams and tigers seem to like me. Not scared of me like some other fish