Update on ribbon eels: After keeping one for 6 years I discovered that if you allow them a hiding tube that they can fit their whole body into, they will eat most of the time. Took a few years to figure out why, but it became apparent: They know they are long and can be bitten in half easily, so if they are not hidden in a dark tube they will be too scared to eat. So, of all the people who got a ribbon eel since then, and a tube (like 3/4" pvc) longer than the eel, almost all of the eels started eating (silversides, mollies, etc, fed on a stick). Unfortunately the escape artist part is still true. Open-center tanks are ok however (euro rim all the way around), because the eel only slides up the walls and never just jumps up out the center of the water.