The difference between observing LIVE sea stars and trawled specimens can be seen in brisingid sea stars.
Brisingid Sea Star
Image courtesy of NOAA Office of Ocean Exploration and Research, 2016 Deepwater Exploration of the Marianas. Download larger version (jpg, 790 KB).

The difference between observing LIVE sea stars and trawled specimens can be seen in brisingid sea stars.

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