any fish that eat digitate hydroids, or something that will?

[Reef Puffer]

looking for something that will eat digitate hydroids. preferably a small fish that can live happily with my current fish in my dt for years to come...

40 gal dt (upgrade very soon)
pink/blue spotted goby/pistal pair
old black molly
very small yellow tang
small scooter dragonet
young maroon clown
snails and hermits
some acans
my finger coral
pseudocorynactis and other random hitchhiker Corallimorphs/mushrooms?

please help, these worms are breeding fast and seem to bother the couple corals i do have. thanks.