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  • A krill specimen that was spit out by a blue whale I was with. As depicted here, the krill was about the size of my little finger. The blue whale had just come up from deeper water, where it was likely feeding.
    krill-from-blue-whale-sri-lanka-2015...tif
  • Small krill species that was schooling in large aggregations in relatively shallow water off the southern coast of Sri Lanka. Blue whales and Bryde’s whales frequent these waters and feed in the area. I do not know whether they consume this particular species.
    small-krill-species-sri-lanka-201502...tif
  • A relatively large krill specimen that was spit out by a blue whale I was with. The whale had just come up from deeper water, where it was likely feeding.
    krill-from-blue-whale-sri-lanka-2015...tif
  • This is blue whale feces, discharged by a whale that had surfaced after feeding on krill in deep water in southern Sri Lanka. The neon red-orange color of the defecation is due to the whale's krill-based diet. The feces dissolve rapidly, as is apparent from the fizzing around the large clumps in this image. Photo taken under permit.
    blue-whale-feces-krill-Balaenoptera-...tif
  • The shipping lanes south of Sri Lanka are among the busiest in the world. Blue whales (Balaenoptera musculus brevicauda) and other cetaceans often congregate in these shipping lanes to feed on krill below. The potential for lethal ship strikes is clear.
    blue-whale-shipping-lane-sri-lanka-b...tif
  • Fluke of a blue whale (Balaenoptera musculus) diving to forage for krill in deep water. Note the distinctive crease on the whale's dorsal surface, just behind the dorsal fin. This, plus several white spots on this whale's body (including the two white spots visible on the right fluke), made this individual easy to recognize. Photograph taken under permit.
    blue-whale-fluke-Balaenoptera-muscul...tif
  • Indian Ocean blue whale (Balaenoptera musculus indica) returning to deeper water to forage for krill after a brief surface interval to replenish air supply.
    blue-whale-indian-ocean-balaenoptera...tif
  • Close-up view of the throat grooves on a dead blue whale, found in the Indian Ocean of Sri Lanka. The whale was most likely the victim of a ship strike by a large container vessel. The main shipping channel south of Sri Lanka passes directly through feeding grounds of blue whales and other cetaceans, which gather in the area to feed on aggregations of krill in deep water. Photo taken under permit.
    throat-grooves-blue-whale-Balaenopte...tif
  • Fluke of a blue whale (Balaenoptera musculus) diving to forage for krill in deep water. Note the distinctive crease on the whale's dorsal surface, just behind the dorsal fin. This, plus several white spots on this whale's body (including the two white spots visible on the top of the right fluke), made this individual easy to recognize. Photograph taken under permit.
    blue-whale-fluke-sri-lanka-Balaenopt...tif
  • My friend holding up fresh pygmy blue whale defecation. The brilliant orange-red color of the blue whale poop derives from krill diet of the cetacean.
    ron-leidich-holding-blue-whale-defec...tif
  • Bryde’s whale (Balaenoptera brydei) defecation, photographed in the Indian Ocean a few seconds after the whale passed, leaving a long trail of feces. The orange-red color likely derives from a diet of krill.
    brydes-whale-defecation-balaenoptera...tif
  • A blue whale diving down to feed on krill in the Indian Ocean, south of Sri Lanka. This whale was relatively inquisitive, proactively approaching on several occasions, and swimming along underneath our boat in one instance. This whale is easily recognizable by the white patch on the left side of its head. It also has a white area on the right side of its nose, two white spots on the right side of its fluke, and a large, visible indentation on the dorsal surface of its caudal region. Photograph taken under permit.
    blue-whale-diving-Balaenoptera-muscu...tif
  • Pygmy blue whale (Balaenoptera musculus brevicauda) commencing its descent to forage for krill in the Indian Ocean, south of Sri Lanka.
    blue-whale-balaenoptera-musculus-bre...tif
  • Dead blue whale (Balaenoptera musculus) floating at the ocean surface. This whale was most likely killed by a ship strike that took place in the shipping lanes just south of Sri Lanka. Container ships and other large boats use these shipping lanes day-in and day-out. The shipping lanes are situated in the middle of feeding grounds for blue whales and other cetaceans, which dive down to deep water to forage for krill and other food. Photo taken under permit.
    dead-blue-whale-Balaenoptera-musculu...tif
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Tony Wu Underwater Photography

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