Fishy and Fru both let me pet them, they don't necessarily like it but they tolerate it. I guess they just think that fingers mean food, and if I touch them it's no biggie because they might get food! Chance bites my fingers but I can't pet him. Haze is the same way, only not as brave as Chance. He's my skittish fellow. Fishy and Fru are so brave when it's WC time! When I siphon the gravel, they chase my fingers and try to bite them the whole time, they aren't even afraid of the siphon or the fact almost my whole hand is in the water. Bettas are awesome.