hi all! i've got this betta in a community tank with some tetras, cories and guppies (i know guppies and bettas together are normally a bad idea but we had a bit of a fry explosion and we had to separate the males from the females) and he's normally the most docile fish you'll ever meet-none of the guppies have had their fins nipped at all and they've been in there for months! anyway, he's recently got into the habit of going for my fingers when i feed the fish. does anyone know why? he's about 2 years old now and has never done it before.