Researchers and filmmakers are exploring the Superior Shoal, an underwater mountain in Lake Superior. (Courtesy of Inspired Planet Productions, via Bridge Michigan)

The Boxfish Luna, the underwater drone filmmakers are using to help document aquatic life on the Superior Shoal. (Courtesy of Inspired Planet Productions, via Bridge Michigan)

Filmmakers and researchers found rocks covered in hydra while exploring the Superior Shoal, an underwater mountain in Lake Superior. (Courtesy of Inspired Planet Productions, via Michigan Advance)

Researchers and filmmakers are exploring the Superior Shoal, an underwater mountain in Lake Superior. (Courtesy of Inspired Planet Productions, via Bridge Michigan)

(This story was originally published by Bridge Michigan, a nonprofit and nonpartisan news org

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