Well today I went to check my established tank that has my pair of kribs and all my neons andthis is that I saw; my little guppy with almost all of it's tail missing, it must of gotten too close to thier cave. Then it started swimming, but it was very wobbly. The current pushed it away, towards the kribs cave. All the sudden, my male krib rushed over and bit more of the guppies tail. Then the guppy fell to the ground and my female krib swam over and sucked it's head into her mouth! She almost ate the entire fish. Then she spit it out and it looked gross, but apparently it looked good because my betta juliet came over and just but into it and swam off with it into her cave... I haven't seen it since.