Pep Coll, one of the best-known and most influential marine biologists in the Balearic Islands, has died in Palma after an illness, and his passing has left a strong impact on the conservation and marine sector. The death of Pep Coll leaves behind a career dedicated to the knowledge of the marine ecosystems of the Balearic Islands and, especially, to the study of marine reserves, the management of fishing resources, and the mechanisms that allow biodiversity to recover when a marine area is correctly protected.