10 weird creatures found in the deep sea .

Shape-shifting whalefish
An elusive whalefish was spotted 6,600 feet (2,013 meters) deep offshore of Monterey Bay, California.

An elusive whalefish was spotted 6,600 feet (2,013 meters) deep offshore of Monterey Bay, California. (Image credit: © 2021 MBARI)
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The Monterey Bay Aquarium Research Institute (MBARI) released footage in August showing a bright orange, female whalefish (of the order Cetomimiformes) around 6,600 feet (2,013 m) deep offshore of Monterey Bay, California.

Very little is known about this bizarre fish because of the three drastically different appearances of the juveniles (tapetails), males (bignoses) and females (whalefish). The three forms look so different that scientists originally thought they were three different species. The shape-shifting transformation from juvenile to mature females is believed to be one of the most extreme among any vertebrates.

"Whalefish have rarely been seen alive in the deep, so many mysteries remain regarding these remarkable fish," the Monterey Bay Aquarium Research Institute tweeted.
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