My largest male dovii about 18" his tank is always drama during cleaning he sits back lines up and charges my hand. Dovii are very fast you dont want a fish that big to bite you. Just recently hit my scraper so hard he broke it. I have found out if I use two syphons it distracts him a little. The only other real bad one at the moment is my 13" male jaguars tank. He attacks hand, syphon, scraper he is relentless. He tries to sneak attank you when you open the lid to clean the tank, or even feeding time. Both fish are serious glass bangers.
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