A story of three eels
It's a little long but bear with me. So my wife wanted an eel for "her" 125 as a Christmas present. We have a snowflake in "my" 125 and I wanted a different type of eel. After much research I decided to get her a Skelator or a Chainlink. I told my fish guy to get me one or the other, didn't matter which and I wanted one about 8 to 12 inches.
After a month of none being available thru his supplier I took things into my own hands and found two Chainlinks in Florida. I ordered them about 2 weeks ago; one for my wife and one for my fish guy as payment for receiving and quarantining my eel. One was about 10 inches and the other about 12 inches. The larger one was also much thicker than the smaller guy. They were qt'd in different tanks.
Over the last week I have stopped in a few times and saw them eating. The smaller one was very easy to feed. The larger one was kinda sporadic feeding and I saw him mouth a Snowflake eel a few times that was also in the tank while searching for food. I told fish guy that he needed to move one of the eels but he wasn't worried for the little guy.
Now these are supposed to be very much like a Snowflake; very peaceful and easy to care for eels. Yesterday we decided to take the smaller one and the fish guy could keep the larger one. This morning the larger one bit the head off a small blue and yellow Damsel. Now fish guy was concerned about the little Snowflake and decided to move the Chainlink into another tank but he needed to move a few fish out of that tank first.
Now we get to the the Tesselata part of the story. He has a 350 gallon with several fish in it and it has a, wait for it, a Tesselata in it. This eel has never bothered any of the fish in the tank. Well as soon as he put the two fish in form the other tank, the Tesselata grabbed one and ate it before you could say Boo.
So it seems that everything I have read about Tesselata eels is probably true, They can and probably will be fish killers. From my readings this seems to be true for all fanged tooth morays. Even the pebble tooth eels (Snowflake, Chainlink, Skeletor and other Echidna eels) can be fish eaters, but from my research that seems to only happen with adult eels. Seems very weird for this little guy to have ate a damsel. Glad we choose the other one

Here's the little guy
-Bob