Patagonian Toothfish

A deep, cold-water fish of the Southern Ocean, typically found several hundred to over a thousand metres down around sub-Antarctic islands and continental shelves, so it is not a species encountered by casual observers on land or in shallow water. Most records come from commercial or scientific fishing vessels rather than direct observation, and it is long-lived and slow-growing, reaching considerable size and age over decades. It is widely sold as Chilean sea bass, which is how most people encounter it.