Shoal of Mackerel Scads, Decapterus maruadsi, Ulong Channel, Micronesia, Palau

reef reefs shoal school schooling swarm group groups mackerel scad round scad travally trevallys scad scads travelly travellys jacks jack jackfish jackfishes predator carangidae silver underwater marine wildlife marine fauna nature aquatic sea ocean underwaterphoto underwaterpicture underwaterphotography underwaterworld sealife carolines islands carolines pacific oceania oceanica shoal of mackerel scads decapterus maruadsi ulong channel micronesia palau horizontal format