How long can a betta fish survive without eating ? My *NEW* Betta fish that I got on April 9th won't eat. I've tried Blood worms, Brine Shrimp, Betta pellets, Betta flakes, and he won't eat any of them. Also unlike my previous betta *God rest his fishy soul* Deltax isn't very friendly. He often stays floating on the top of the water and his personality is shy or independent. Doesn't show excitement when I tap the glass and won't eat. I keep fearing he'll starve himself to death. Anyone know how I can get him to eat.