One organism's trash is anther'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.

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. Image courtesy of the NOAA Office of Ocean Exploration and Research, 2015 Hohonu Moana.

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