Shark Reef Give your pet fish a taste of life in the big, blue, shark-infested ocean with this fun aquarium Three tethered 3-D sharks ply the waters around the simulated coral reef A glowing treasure chest, an attacking moray eel, and a bubbling volcano add to the realism Comes with air pump and under-gravel filtration system; you supply the fish (goldfish or betta) Goldfish may get cocky sensing that the sharks are too timid to attack