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  • This is a flock of 30 whooper swans (Cygnus cygnus) heading north from Hokkaido, commencing their migration to higher latitudes for the warmer months of the year.
    cygnus-cygnus-whooper-swan-migration...tif
  • Arctic tern (Sterna paradisaea) in flight in the middle of a beautiful Arctic summer night. This species undertakes an incredible pole to pole migration each year to spend summer in both the northern and the southern hemispheres.
    arctic-tern-flying-overhead-blue-sky...tif
  • Malcolm was our cook during the kayak expedition. Here he is holding a large male land crab (Discoplax hirtipes) at our second campsite, which was at Ngeremdiu Beach. Malcolm told me that female crabs migrate from land to the water to release their brood at the turning of the high tide during full moon. We saw a few females releasing eggs here at Ngeremdiu Beach, and also at the next campsite on Ngchuus Beach. See separate photos of female crab releasing eggs, and of the resulting zoea.
    terrestrial-crab-discoplax-hirtipes-...tif
  • This is a polyp of Alveopora japonica, a small zooxanthellate scleractinian coral that produces large polyps. The orange spheres are planulae, or larval corals. Individual planula migrate from the coral stalk to the mouth, where the planula emerges and swims into the water. The species is found in Japan, Korea and Taiwan. Recent research suggests that genetic differences among the three populations are large enough to warrant consideration as separate species.
    alveopora-japonica-coral-planula-jap...tif
  • This is a polyp of Alveopora japonica, a small zooxanthellate scleractinian coral that produces large polyps. The orange spheres are planulae, or larval corals. Individual planula migrate from the coral stalk to the mouth, where the planula emerges and swims into the water. The species is found in Japan, Korea and Taiwan. Recent research suggests that genetic differences among the three populations are large enough to warrant consideration as separate species.
    alveopora-japonica-coral-planula-jap...tif
  • A pair of Arctic terns (Sterna paradisaea) taking a break betweeen periods of fishing. These birds migrate from the Arctic to Antarctica and back each year, spending summer in the northern and southern hemispheres. Round trip distances traveled by these birds involve tens of thousands of kilometers.
    arctic-terns-sterna-paradisaea-svalb...tif
  • This is a polyp of Alveopora japonica, a small zooxanthellate scleractinian coral that produces large polyps. The orange spheres are planulae, or larval corals. Individual planula migrate from the coral stalk to the mouth, where the planula emerges and swims into the water. The species is found in Japan, Korea and Taiwan. Recent research suggests that genetic differences among the three populations are large enough to warrant consideration as separate species.
    alveopora-japonica-coral-planula-jap...tif
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Tony Wu Underwater Photography

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