The predatory tunicate (Megalodicopia hians), also known as the ghostfish, is a species of tunicate which lives anchored along the deep sea canyon walls and seafloor. The animal is immediately recognizable by its distinct appearance, bearing a resemblance to that of a Venus flytrap. It is one of the only species of tunicate that is a predator versus filter-feeding. Its mouthlike siphon is quick to close whenever a small animal such as a tiny crustacean drifts inside. Once the predatory tunicate catches a meal, it keeps its trap shut until the animal inside is digested. They are known to live in the Monterey Canyon at depths of 200–1,000 metres (660–3,280 ft). They mostly feed on zooplankton and tiny animals, and their bodies are roughly 5 inches across.