Up close with a yellowback fusilier (Caesio xanthonota), photographed while scuba diving at Jena Wall, off the coast of Mafia Island. This pelagic fish is most active during the day, feeding on zooplankton in large midwater aggregations. Yellowback fusiliers live in groups and form shoals with other caesionids, such as the Caesio teres. Often there’s confusion between these two species. See more photos at Scuba Diving at Jena Wall.