There are many types of fish that will eat scuds. Cichlids (like Julidochromis, Oscar, Red Devils), Loaches (like Clown loaches, Zebra Botia, Macracantha Botia loaches), Bettas, Mollies, Tetras, Pea puffers, etc. will go straight after the scuds.

What animal eats a Scud?

They are, in turn, eaten by aquatic insects, salamanders, and some birds. Scuds tend to live in waters too constricted and shallow for fish, but fish can be a major predator.

Will Cory catfish eat scuds?

Scuds do go into the substrate and when the pop out the corydora will eat them as well.