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Mystery 'Blue Goo' Ocean Animal Stumps Scientists

It's blue. It's blobby. What is it?

Amanda Kooser
Freelance writer Amanda C. Kooser covers gadgets and tech news with a twist for CNET. When not wallowing in weird gear and iPad apps for cats, she can be found tinkering with her 1956 DeSoto.
Amanda Kooser
2 min read
A lumpy-ish denim-blue ocean animal lurks on the seafloor sand.
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A lumpy-ish denim-blue ocean animal lurks on the seafloor sand.

This mystery ocean creature is under investigation by curious scientists.

NOAA Ocean Exploration

From the same science folks who brought us weird seafloor holes and a ghostly squid comes a new mystery of the deep: a "blue goo" animal.  The National Oceanic and Atmospheric Administration's Okeanos Explorer crew spotted oddball specimens of an unknown sea creature during a recent expedition in the Atlantic.

"Have you heard about the latest Okeanos mystery? Seen multiple times during off St. Croix, this 'blue goo' animal stumped scientists, who thought it might be soft coral, sponge, or tunicate (but def not a rock!)," the Okeanos team tweeted on Wednesday.

The creature is the color of worn denim and appears to have lumpy features across its surface. I think it resembles an underwater version of Inky the ghost from Pac-Man. A different specimen also spotted by the remote-operated dive vehicle looked more like a puddle than a ghost.

The team offered several ideas for what the critters might be. Soft corals, as the name suggests, have soft bodies. Sponges have porous bodies that allow them to filter their food from the water. Tunicates are marine invertebrates sometimes known as sea squirts.   

One of the video narrators said the mystery would likely remain until a sample was collected and examined or until coral experts get a good look at it.

Okeanos Explorer is investigating largely unexplored deepwater areas in the Atlantic to map the seafloor and study the geology and wildlife. It's a major bonus along the way to discover unknown and mysterious animals that dwell there. It highlights how much more we have to learn about the deep.