Observe LL: Observation data of retained catch and discards of French tropical longline fishery

Data collected by at sea by professional observers (OB) and self-reported by fishermen (SR). This program is funded by EU DCF (2007-2013) and EU FEAMP (2014-2020). Commercial pelagic longline fisheries performed by French longliners based in Réunion Island and Mayotte. Retained catch and discards were monitored exhaustively.