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Photos provided by the aquarium showed a flat, round, gray fish lying on its side in the sand.

Photos of a person kneeling next to it, and another of a pickup truck parked next to it, gave a sense of its large scale and size.

The stir it has created on social media prompted a New Zealand-based researcher who has studied sunfish to contact the aquarium. After looking at photographs of the fish, Marianne Nyegaard was able to confirm that it was indeed a hoodwinker sunfish — rarer than the more common ocean sunfish — and said she believed it may be the largest such fish ever sampled, according to the aquarium.

In research published in 2017, Nyegaard discovered through genetic sampling and observation that the hoodwinker sunfish, or Mola tecta, was a different species than the ocean sunfish, Mola mola. “Tecta� in Latin means hidden or disguised, referring to a new species that had been hiding in plain sight.

In previous years, the hoodwinker sunfish has . It’s also again washed ashore more recently in California and Alaska, challenging the theory that it only lives in the southern hemisphere, the aquarium said. It’s also likely that the fish has washed ashore in other parts of the Pacific Northwest but was mistaken for the more common ocean sunfish at the time, the aquarium added.