What eats a bat star?

Feeding batfish can be problematic. Sadly, many never take to eating in captivity. Live prey works best, especially crustaceans. Eventually, a batfish may learn to take frozen shrimp or mycids. Small snails, worms, and feeder fish may also be offered.

Read more: http://fishinsects.suite101.com/article.cfm/walking_batfish_in_the_aquarium#ixzz0QpbjXaQy