Stegastes planifrons - Juvenile threespot damselfish (Stegastes planifrons) in a pillar coral (Dendrogyra cylindrus) in Mona Island, Puerto Rico. Threespot damselfish are highly territorial, protecting the resources within their domain, They will aggressively attack and posture to scare off competitors, regardless of their size. © Image courtesy of Ron Hill, NOAA Fisheries, SEFSC-Galveston. - Public domain - Wikimedia Commons
Marine du Prêcheur - Albert Falco