Call me Ishmael: White Whale Spotted in Alaska Waters

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A rare white killer whale, Orcinus orca, better known as an Orca,
photographed by researchers off the coast of Alaska on 23 February.
Image: Holly Fearnbach (NMML, NMFS permit 782-1719) [wallpaper size].

Seattle researchers were working off the coast of Alaska when they saw something amazing; a 25-30 foot long male “killer whale”, Orcinus orca, that is white instead of being black-and-white, the characteristic color scheme for this species. This white whale, which was identified as a male due to its very tall dorsal fin, appeared to be a healthy adult weighing roughly 10,000 pounds.


“I had heard about this whale, but we had never been able to find it,” said Holly Fearnbach, a research biologist with the National Marine Mammal Laboratory in Seattle who photographed the rarity. “It was quite neat to find it.”
When they saw the whale, the researchers were aboard the National Oceanic and Atmospheric Administration research ship, the Oscar Dyson, conducting an acoustic survey of pollock near Steller sea lion haulout sites. The ship followed the whale through rough seas for approximately 30 minutes, with most of the scientists busily snapping pictures of the rare animal.
“Everybody actually came out and was taking pictures,” Fearnbach said. “It was a neat sighting for everybody.”
Some scientists argue that there are at least two distinct species of orcas; those that eat primarily fish and thus reside along the coastlines where salmon congregate, and those orcas that prey upon seals and whales, thus ranging widely through open seas and along shorelines as yhey follow their prey. The white orca that was recently photographed is the fish-eating type. Fish-eating orcas are frequently seen around the Aleutian Islands during the summer, but these winter sightings are important evidence that these orcas may be resident instead of migratory.
“With hundreds of killer whales documented around the Aleutian Islands, this was equivalent to finding a needle in a haystack,” Fearnbach mentioned.
The white whale was photographed in the company of a family group, or pod, of 12 other normally-colored orcas 2 miles off the Kanaga Volcano on Alaska’s Aleutian Islands on 23 February.


A rare white orca, Orcinus orca,
cavorts with its pod in rough seas off the coast of Alaska on 23 February.
Image: Holly Fearnbach (NMML, NMFS permit 782-1719) [wallpaper size].

“When you first looked at it, it was very white,” Fearnbach stated.
But a closer inspection of the images reveals that this whale is not all white, as first suspected, but instead, those areas of its body that would normally be black actually are pale tan, which is consistent with leucism. Leucism is a genetic condition that causes a reduction in all skin pigmentation, but it is not true albinism, which causes a cessation of all pigment production. Thus, this whale is not atrue albino, which pleased excited researchers since albinos tend to suffer a variety of diseases and other health problems that prematurely end their lives.
White orcas have been reported in the Aleutians and in the Bering Sea as well as along the Russian coast. It is not yet known if these other sightings represent other individual orcas, or this animal.
“This is the first time we came across a white killer whale,” pointed out John Durban, a research biologist at NOAA’s Alaska Fisheries Science Center in Seattle.


A rare white orca, Orcinus orca,
photographed off the coast of Alaska on 23 February.
Image: Holly Fearnbach (NMML, NMFS permit 782-1719).

Sources
NOAA (images, quotes)
KomoTV (quotes).

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About GrrlScientist

grrlscientist is the pseudonym of an evolutionary biologist and ornithologist who writes about evolution, ethology, and ecology, especially in birds. After earning a degree in microbiology (thesis focus: virology) and working at the Fred Hutchinson Cancer Research Center in Seattle, she earned her PhD in zoology from the University of Washington in Seattle, where she studied the molecular correlates of testosterone and behaviour in white-crowned sparrows. She then worked a Chapman Postdoctoral Fellow at the American Museum of Natural History in New York City, where she studied the speciation and distribution of lories and other parrots throughout the South Pacific Islands. A discarded scientist, she returned to her roots: writing. Formerly hosted by The Guardian (UK), she now writes about science for Forbes and for the non-profit think tank, the Evolution Institute and she writes podcasts for BirdNote Radio. An avid lifelong birder and aviculturist, she lives with a flock of songbirds and parrots somewhere in Germany.
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0 Responses to Call me Ishmael: White Whale Spotted in Alaska Waters

  1. Harry says:

    Cool!