Opah, © Amadeo Bachar

At a glance

Eco-rating Mercury Omega-3s


Opah are easily identified by their silver skin, white spots and brilliant red fins. This solitary fish, which does not form schools, is found worldwide in the temperate and subtropical waters of the Atlantic, Pacific and the Indian Oceans. Opah can reach almost seven feet (more than 2 meters) in length and weigh over 500 pounds (over 220 kilograms).

Commercial Sources

The main sources of opah are the United States, New Zealand and French Polynesia. Opah sold in the U.S. market are almost exclusively from Hawaii.

Capture Methods

Since opah do not swim in schools, they cannot be directly targeted for commercial fisheries. They do, however, associate with tuna and billfish and are therefore caught incidentally on longlines for these species.

Recommended servings per month

Contaminant Men Women Kids 6-12 Kids 0-5
Opah Mercury 1 1 1 < 1
Eco details: 

Little is known about the basic biology of opah, making it difficult to determine population health or how effectively they are managed.

These fish are caught exclusively as bycatch in tuna longline fisheries, which kill sea turtles, seabirds and sharks.