Thanks for everyones quick response. He is acting normal as of now I'll keep an eye on him. I'm just new to eels and want to do it right. I just got lucky the ribbon eel loves to eat bc I know they can be quite difficult. He leaves all the other fish alone in the tank, including the snowflake eel he could easily swallow. My saddle puffer will swim with him when he comes out of the rockwork. They are a match made in heaven bits weird how they'll hang around one another