Lophelia pertusa, Enallopsammia profunda and Madrepora oculata fragments were stained overnight in a bath of Calcein, a non-toxic fluorescent dye that incorporates into the coral skeleton and help scientists to directly measure growth rates when the coral is returned to the seafloor.
Coral Soaking in Calcein
Image courtesy of DEEP SEARCH 2018 - BOEM, USGS, NOAA. Download larger version (jpg, 2.1 MB).

Lophelia pertusa, Enallopsammia profunda and Madrepora oculata fragments were stained overnight in a bath of Calcein, a non-toxic fluorescent dye that incorporates into the coral skeleton and help scientists to directly measure growth rates when the coral is returned to the seafloor.

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