unidentified damselfish from Tufi, Papua New Guinea

Hi REEF

Attached is a photo of an ?? damselfish taken on a coral reef in Tufi, Oro Province in Papua New Guinea, the reef about 5km for shore, and 10 ft of water on a dive day. Swimming about like any damselfish along Seriatopora corals heads, branching sponges, algae and seagrass beds, and exposed to some wave action. Any help with ID is appreciated.

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