Why do oarfish swim vertically?

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Illustration of an oarfish (Regalecus glesne) with a long, ribbon-like blue body, red dorsal fin, and trailing fin rays, shown with scale bars for 1 meter and 3 feet to indicate its large size.

Why do oarfish swim vertically?: Media

Images

Illustration of an oarfish (Regalecus glesne) with a long, ribbon-like blue body, red dorsal fin, and trailing fin rays, shown with scale bars for 1 meter and 3 feet to indicate its large size.

Oarfish

The Regalecus glesne, commonly called oarfish, has a silver, ribbonlike...

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