GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY GEORGETTE DOUWMA / SCIENCE PHOTO LIBRARY
Cheek-bar cardinalfish and anchor coral. Cheek-bar cardinalfish (Apogon sealei) swimming over anchor coral (Euphyllia ancora coral) on a reef. The cheek-bar (or Seale's) cardinalfish is nocturnal and is often found in pairs and small groups. Photographed in the Lembeh Strait, North Sulawesi, Indonesia.
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