He just needs a tickle and pat...Well I do keep an eye on him when I clean the window by hand. He is somewhat curious but I don't fear him like that. If he did it would be because I did something wrong. He is very intelligent and recognizes me. I have a healthy respect for his capabilities. He has never tried anything with me at all. He actually stays on the opposite side of the tank any time I place my hands in there. The wolf on the other hand is different he has np checking things out!