in my saltwater tank the banded coral shrimp tries to attack my hand when im cleaning the tank... and the peppermint shrimp try to clean my hand since theyre a type of cleaner shrimp.
I just go to my kitchen and get one of my french knives and show it to the fish and they chill out.
my zebra tilapia will some days come up and rub my hand other days try to attack it, especially when people are with me she goes agressive, but when I am alone she is the other way
I've never had this happen with any of my fish but Sharkaquarium used to have the biggest Dovii that I've ever seen and it would try its best to break through the tank to get anyone who stands close enough.