Today we moved to the western part of the archipelago: Isabela and Fernandina Islands. Both Islands are still very active with recent or ongoing volcanic eruptions. The western islands are also very productive due to the influence of the Cromwell Current. This subsurface current brings many nutrients that promote the growth of plankton and marine algae. Due to this process, the biomass of marine iguanas, sea turtles and many other marine organisms are the highest in the archipelago.