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  • Stony corals, mostly Acropora spp., growing at a shallow reef flat in Fiji.
    80210.jpg
  • A colourful diversity of stony corals at the Great Barrier Reef. Pectinia paeonia (two colonies left), Lobophyllia sp. (center) and branching Porites cylindrica together with a pink Montipora sp.
    5586.jpg
  • Staghorn corals, Acropora formosa (pink) growing entangled with Acropora nobilis (cream). These species often grow together. Photo from Whitsunday Island, GBR, Australia.
    5598.jpg
  • Sohal of Damselfishes (Blue Chromis, Chromis sp.) gathering around a branching coral (Acropora sp.).
    18377A.jpg
  • Reef flat with dense growth of coral on the island of nananu-I-Ra (Mokusigas), Viti Levu, Fiji.
    18324.jpg
  • Reef flat with dense growth of coral on the island of nananu-I-Ra (Mokusigas), Viti Levu, Fiji.
    18551.jpg
  • Reef flat with dense growth of coral on the island of nananu-I-Ra (Mokusigas), Viti Levu, Fiji.
    18585.jpg
  • Reef flat with dense growth of coral on the island of nananu-I-Ra (Mokusigas), Viti Levu, Fiji.
    18584.jpg
  • Reef flat with dense growth of coral on the island of nananu-I-Ra (Mokusigas), Viti Levu, Fiji.
    18552.jpg
  • Reef flat with dense growth of coral on the island of nananu-I-Ra (Mokusigas), Viti Levu, Fiji.
    18283.jpg
  • Reef flat with dense growth of coral on the island of nananu-I-Ra (Mokusigas), Viti Levu, Fiji.
    18317.jpg
  • Guard crabs (Trapezia sp. and Tetralia sp.) in a thin birdnest coral (Seriatopora hystrix), Bunaken, North Sulawesi, Indonesia.
    8118.jpg
  • Common coral gall crab (Hapalocarcinus marsupialis, female) from Rarotonga, the Cook Islands, south Pacific.
    8116.jpg
  • Trachyphyllia geffroyi
    5648-D.jpg
  • The corallites of Diplorastrea heliopora.
    80147.jpg
  • Alveopora sp.
    5637-D.jpg
  • Dense and impressive growth of Porites cylindrica (branching, yellow in the foreground) with Acropora sp. and Merulina sp. in the background. Photo from Bunaken, Indonesia.
    5398.jpg
  • Pocillopora damicronis
    80195.jpg
  • Tubastraea sp., close up of the expanded polyps.
    5085.jpg
  • Tubastraea sp., from a reef wall in the Maldives.
    5648.jpg
  • Blastomussa wellsi
    80101.jpg
  • Porites sp. forming a microatoll at Green Island, GBR, Australia.
    80112.jpg
  • Acropora spp. growing densly on the shallow reef flat of Heron Island, Great Barrier Reef, Australia.
    5040.jpg
  • Tubastraea sp. with fully expanded polyps.
    5540-D.jpg
  • Acropora sp.
    5638-D.jpg
  • Acropora clathrata from the Maldives
    80029.jpg
  • Burrows of the petroglyph shrimp Alpheus deuteropus in stony corals (Acropora sp.) from Krabi, Thailand. Do note the small, munidentified hydrozoans that line the burrows.
    8136.jpg
  • Acoel, commensal flatworms of the genus Waminoa living on a stony corals from the genus Caulastrea.
    6032-D.jpg
  • Acoel, commensal flatworms of the genus Waminoa living on the stony coral Tubastraea sp. Photo from a reef in Indonesia.
    6004.jpg
  • Acoel, commensal flatworms of the genus Waminoa living on the stony coral Tubastraea sp. Photo from a reef in Indonesia.
    6109.jpg
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Alf J. Nilsen Natural History images

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