Also known as the moonfish or Jerusalem haddock, the opah is a large species of pelagic fish found worldwide. L.guttatus is a fairly large species of fish with adults growing up to 6 feet long and weighing in at 600 lb. Opahs spend their entire lives in the open ocean at depths ranging from 200-2000 feet deep, they are usually solitary animals but are known to school with Scrombids (tuna and allies). Like most pelagic fish they have a diet of mostly squid and krill. Their scientific name means spotted in Latin referring to the fish’s spotted body.