is it south american and would a small one get along with my 7-9"cudas 7 inch tats jurapari cichlid,pbass,spiny plec,juruense catfish?how big do they get?
If it's the same eel I'm thinking of (Synbranchus marmoratus), then rather don't attempt to mix it with your other fish. In some cases, it will get on with tank mates, but otherwise they're known for their occasional aggression and general boistrous nature.