Physiological characteristics of benthic cyanobacteria on a Caribbean coral reef Petra Visser 1 · Joost den Haan 1 · Hannah Brocke 2 · Maggy Nugues 3 ·Mark Vermeij 4 1. Aquatic Microbiology, University of Amsterdam, The Netherlands; 2. MPI for Marine Microbiology, Bremen, Germany; 3. Université de Perpignan (UPVD), France; 4. Research Institute CARMABI, Curaçao