The 1st Temporal Study of the CIGUARISK’s Project included in Task 1.2. “Temporal and depth distribution of Gambierdiscus and Fukuyoa in selected ‘hotspots’ of the Canaries and Balearic Islands ” is being performed in May 2021 in one week sampling campaign in Gran Canaria (Canary Islands) and one week sampling campaingn in Mallorca (Balearic Islands) in selected hotspots of the slected islands. One of the aims of CIGUARISK is to describe the temporal distribution of Gambierdiscus and Fukuyoa in selected ‘hotspots’ of the Canaries and Balearic Islands.