Hi Bro, you can keep garden eel.. they are of the right length and pretty...try google it.. very easy to keep... i kept it my nano tank..it'll eat anything you feed it with...etc Pallet, shrimps, bllod worm... as longs as it shifted towards it's direction.. i noted eels will not start eating during the first 2 - 3 weeks.. not to worry ... as long as it as mature tank with plenty of live sand and rocks... it'll be taken care ...