from mealworms!!! :p
Mealworms are used to feed reptiles, and predator fish. You get them in a container, toss them lettuce or an apple slice or whatever, take one out, chop the head off and squeeze out the meat x.x I warn never to feed the shell.... my one girl took off with a large piece meant for Madame and she got it stuck
it came out eventually, but she was unhappy with her greedy demise xD
I've used it for conditioning before, because it's got the protein, it's right fresh - not even frozen, and they love it. No betta I have refuses mealworms...