do you regularly try to feed him with pellets on your fingertip? if so, he might be expecting a tasty treat. other than that, i could definitely see a betta mistaking the shape of a fingertip as another betta. did he start nesting afterwards?
So remember, when you're feeling very small and insecure,
How amazingly unlikely is your birth,
And pray that there's intelligent life somewhere up in space,
'Cause there's bugger-all down here on Earth.
Loki/Grendel/Gail/Beowulf/Camilla/River/Bathory/Arwen/Lafayette/Deb/Jack Skellington (soon)