Ive had a fresh water moray, tire track, peacock, spiney, fire, and blockspot eels. You probobly already know but the need an escape proof tank, these guys are worse than snakes! They would also like a fine subsrate to bury in. I include several burried peices of PVC. I feed shrimp, and blood worms, they love live food, but that realy isnt accesable around me so i go w/ the frozen. Some of these bad boys get quite large(tire track and fire)so make sure you have got an adequitly sized tank, say no les than,65gallons? Some of the care sheets say more but its up to you our Fire is in a 75 an the blockspot is in a 20. HTH