i have some danios that went i go to test the water they some and like bump into my hand but i dont think they can bite because their mouths are so small
Mine often come around my hands whilst water changing and have a nibble and nose around, it doesnt hurt, until you get used to it, its automatic reaction to pull your hand out quickly
On the other hand, my Texas is now starting to take an interest in my hands too, think his bites might be more of a problem
convicts pack a nasty bite i was changing water yesturday and my male who is about 4" went for me and his red teeth sunk into me and felt like a nasty pinch
Pandora, my cat, is fascinated by the water in the tanks. She often dips her paw in and drinks the water that gets on her fur. One time I happened to be watching her and saw a fish swim up to it and either bump it or nibble it. She was so shocked! I never saw her jump up and run so fast.