never had it in me to chop earthworms up , but I'd sit and watch my figure 8 and stanley pool puffers [ thank you SirMinion]chew the livin begeezez out of them , while my Jewel cichlids had tugs -o-war over them , but no I couldn't chop um .Fish Buddy said:I fed my zebra danios black ants (past tense because I don't have them any more) and I also fed them chopped up earth worms -tetras liked them too (in the same tank). The danios ate the ants ok but would rather play with them by pushing them around the serface of the tank.