I dislike those flatworms... I have a few in the fuge..but none in the display. Hendrix actually eats them! If he doesn't ingest them, he surely snicks 'em in... I've watched him snipe them from the glass over and over again.
You know that those lil "ghosts" completely DEVOUR copepods right? I watch them as they cruise the glass, envelop them, and what's real cool..is watching them pass through the glass-like body of the flatworm.