“Effective conservation of the oceans relies largely on long-term monitoring of key species and habitats over wide geographical areas. This is notoriously difficult due to the high cost of such programs. As a consequence, we find ourselves with data ‘cold-spots’, areas for which we have little or no information. Citizen science, aka the involvement of volunteers or non-specialised people in science, is an increasingly popular way of conducting monitoring of species and ecosystems over a large geographical scale and time periods, therefore reducing the number of cold-spots…”

Read on at: IUCN.