SOCIB-Canales is a seasonal hydrographic and biochemical survey of the Balearic Sea, monitoring the Ibiza and Mallorca Channels. 15 CTD stations were carried out over 4 days; 5 CTD stations across the Mallorca Channel (MC) and 10 CTD stations forming one transect across the Ibiza Channel (IC). Samples for microplastics have been also collected in both channels.