I wish i had a pick but in my years ive had a few wolves. My largest would let me pet him and hand feed. They are a pretty smart fish too. They will get to know you. I was feeding mine once but i was wearing a hat so he must have not known it was me and he started to creep towards my hand while i was moving stuff so i took the hand out. Took my hat off and he came and took food from my hand. A few days later did the same thing but he got me that time and it wasnt the greatest feeling I learned he wasnt stupid. He was around 13 inches or so. I loved that fish but i sold him to keep cichlids again. I now have a red wolf and he will never be sold