Chloeia flava Fireworms

[Pando]

Hi i'd Appreciate any help i can. I had 3 of these fireworms in my 260 Gallon off some live rock ive recently put in. Ive caught 2 of them but there is still another in there. Are my fish in any danger from him? I have 2 large schools of Bengaii Cardinals and Green chromis, Small Picasso Trigger, Filefish, Saddleback Puffer. Ive looked up information on them but cant get any real idea if they will hunt down my fish. I dont have a real cleanup crew will he just eat leftovers and not bother the fish? Thank you