Echidna Nebulosa-Snow Flake
Probably the most kept of all the eel, the Snow Flake eel will eat small fish and inverts, so it doesn't make for a good reef fish. They also reach a good size, growing to 2'-3', though you'll see small ones for sale at LFS all the time. They can be kept with non aggressive fish as long as they're large enough not to be swallowed. The very small ones, that they sell all the time, need to be feed 4-5 times a week otherwise they'll probably die. They should be feed with a feeding stick.