The POSEIDON project ran an annual autumn pelagic survey in the English
Channel, Celtic Sea and Bristol Channel running from 2012-2016 on the RV Cefas
Endeavour.
This dataset comprises phytoplankton abundance and size data for CEND18_12,
CEND20_13, CEND20_14, CEND22_15, and CEND 22_16.