I went home on lunch and witnessed my betta attack one of my 4 Ghost shrimp killing it, then proceed to swallow it whole. I don't know how it managed to swallow it, it was a decent sized shrimp. It gulped it up tail first but couldnt manage to get the head down. It just swam around with a shrimp head and attena sticking out of its mouth!!! My betta looked every bloated with an inch long shrimp in his gullet. I wanted to watch more but had to go back to work. I come back from work and no sign of the shrimp. I can only find 2 shrimp in my 5g tank now. I think my betta must have killed another while I was gone.