When we first started handling him after he ate 3 times I was putting him back in his tank one day. Everything was fine as I was handling him and after I set him back into the tank he struck at me and missed as I was removing my hand, hitting his nose on the glass. One other time I was setting him on the scale to weigh him and he tried to strike when I was picking him up off the scales. Other than those two times we have never had an issue.