Ghost Shrimps are small shrimp often used in fish tanks. They are transparent, easy to take care of, and cheap to buy. They are used both as aquarium inhabitants and as live feed for bigger fish. The scientific name is Palaemonetes and are also referred to as glass shrimp and feeder shrimp. Ghost shrimp grow to around 1 1/2 to 2 inches long. If you have a fish, the little shrimp will feed on food leftovers. They will also eat dead plants, algae, and other organic material. They are an ideal tank cleaner. They grow fast, have a healthy appetite and live for around 12 months.