One organism's trash is another's treasure—these crinoids have taken up residence on a tall dead sponge stalk to give them better access to food in the water column.
Leg 4 Dive 11: Karin Ridge Top
Image courtesy of the NOAA Office of Ocean Exploration and Research, 2015 Hohonu Moana. Download larger version (jpg, 650 KB).

One organism's trash is another's treasure—these crinoids have taken up residence on a tall dead sponge stalk to give them better access to food in the water column.

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