Hopefully you already know, but if not, don't let any fish aanywhere near them. Aside from possible disease or pathogens, the fish will nibble at their kills eventually killing it. The feathery gills entice strikes from fish because of how it looks like little worms and they can't resist even if they wanted to.
I lost a 42" Two-toed Amphiuma because I didn't remove uneaten feeder fish from it's tank. They'll eat the slime coat off amphibians too.