Lampris immaculatus, commonly known as the southern opah or southern moonfish, is a species of fish native to the Southern Ocean. The species is found commonly in New Zealand waters. They are caught commercially using long-line fishery in New Zealand. The most common prey species for the southern opah are juvenile onychoteuthid squid Moroteuthis ingens, which were found in 93% of 69 fish. It was discovered that 14% of the opahs contained plastic pollutants in their digestive tract, which indicates signs of high plastic pollution in the Southwest Atlantic.