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The redtoothed triggerfish (Odonus niger) is a tropical fish in the family Balistidae, the triggerfishes. It is native to the tropical Indo-Pacific area, including the Red Sea, the African east coast, the Marquesas Islands and the Society Islands, across to southern Japan and the Great Barrier Reef of Australia. Redtoothed triggerfish are normally deep blue or purple with a light blue head. They are omnivorous and mostly opportunistic feeders, with crustaceans as their primary food source. They also feed on zooplankton and algae, and remains of cephalopods and fish have been found in their stomachs. This redtoothed triggerfish was photographed off the coast of Anilao in the Philippines.Photograph credit: Diego Delso