Commonly referred to as an eel, these assorted Mastacembelus collected from Lake Tanganyika are not true eels, but are cool additions to a Tanganyika biotope tank. These are 6-8" fish, currently eating live blackworms. They can and will eat fish, so choose tankmates carefully. They will need a hiding place to feel secure. Please make sure you can provide them with appropriate food before purchasing this fish.