description Opah Overview
Opah is a large deep-sea fish belonging to the Lampridae family. It’s notable for being the first confirmed fully endothermic fish, maintaining its body temperature through a unique circulatory system. This adaptation allows it to thrive in the cold mesopelagic zone of the ocean. Scientists and marine biologists study opah to understand this remarkable physiological process and its implications for deep-sea life.
insights Ranking position
Opah ranks #16 of 157 in the Deep Sea Fish ranking, behind Fangtooth Fish, ahead of Blobfish.
help Opah FAQ
How can an opah keep its whole body warmer than the surrounding water?
An opah continually generates heat through its swimming muscles and conserves it through countercurrent blood vessels in its gills. This arrangement lets warm outgoing blood transfer heat to colder oxygenated blood entering the body.
Is the opah really the first warm-blooded fish?
It was the first fish confirmed to maintain elevated temperature throughout its body, a finding reported by NOAA researchers in 2015. Tuna and some sharks warm selected muscles or organs, but they do not show the same whole-body pattern.
How large can an opah get?
Opahs are large, disk-shaped pelagic fish, and some individuals exceed 1.5 meters in length. Their rounded silver bodies, red fins, and large eyes make them look very different from similarly sized tuna.
Where do opahs live and what do they eat?
Opahs inhabit temperate and tropical oceans and regularly forage in cold, dim mesopelagic water. They prey on squid, krill, and fish, using large pectoral fins for continuous swimming.
explore Explore More
Similar to Opah
See all arrow_forward
Reviews & Comments
Write a Review
Be the first to review
Share your thoughts with the community and help others make better decisions.
