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The opah has a thick layer of fat that insulates its internal organs and cranium from the surrounding water. However, fat alone is insufficient to retain heat within a fish's body. The gills are the main point of heat loss in fishes as this is where blood from the entire body must continuously be brought in close contact with the surrounding water.
Lampris guttatus, commonly known as the opah, cravo, moonfish, kingfish, and Jerusalem haddock, is a large, colorful, deep-bodied pelagic lampriform fish belonging to the family Lampridae, which comprises the genus Lampris. It is a pelagic fish with a worldwide distribution.
Lampris australensis, the southern spotted opah, is a large, colorful, deep-bodied pelagic lampriform fish belonging to the family Lampridae, which comprises the genus Lampris. It is found in the subtropical and warm temperate southern hemisphere.
Researchers say they've discovered the first known fully warm-blooded fish. It's called the opah, or moonfish, and it lives in cold environments deep below the ocean's surface. Scientists say the ...
Opah -- the large, round and brilliant orange fish in the gallery below -- are a tough catch as they don't often travel in schools, and are typically found only in tropical areas with warm water.
The opah, or moonfish, will be studied as little is known about the species. See more stories on Insider's business page. A 100-pound tropical fish was found on an Oregon beach, surprising scientists.
Lampriformes / ˈ l æ m p r ɪ f ɔːr m iː z / is an order of ray-finned fish.Members are collectively called lamprids (which is more properly used for the Lampridae) or lampriforms, and unite such open-ocean and partially deep-sea Teleostei as the crestfishes, oarfish, opahs, and ribbonfishes.
Close-up of fish melanophores. Fish coloration is produced through specialized cells called chromatophores. The dermal chromatophore is a basic color unit in amphibians, reptiles, and fish which has three cell layers: "the xanthophore (contains carotenoid and pteridine pigments), the iridophore (reflects color structurally), and the melanophore (contains melanin)". [5]