Garden Eels (Heteroconger hassi) are fascinating and for a the advanced aquarist with lots of space, they can be kept in the home aquarium. In order to do so, you'll need a deep sanded so they can burrow and create the holes in which they will live.
Garden eels live a strange life. They anchor themselves to the ocean floor using their own mucus, and contort into strange shapes and positions to catch plankton. Find out more about these weird and wonderful stayathome fish.