Obviously I didn't see nor ever see my Del or Endli catch any live fishes, I kept plenty of guppies in my tank for fun and those are my wolf snack meal (when these guppies all gone then my wolf will be on market prawn for main diet) I spend almost an hour in front of my tank during thr feeding time and I never witness my poly catch a live feeder, all I'm seeing my wolf catching live feeder or chasing yoyo loaches around because the yoyo grabbed a piece of shrimp that's meant for him. Even after light out and moon light up there no activity of my poly coming out for a hunt unless they doing that after my tank totally in darkness after midnight. I saw them come out and stuff their belly up with pieces of shrimp/fish fillet.