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” An unexpected February snowfall wasn’t the only work of nature making waves in Nanaimo.
A pod of Pacific white-sided dolphins and a pod of orcas whales were spotted off the coast of the harbour city on Monday.
In what is considered to be a very rare sight, the orcas were hunting the pod of dolphins and ended up killing two of them. They can be seen diving under the dolphins, coming up suddenly and throwing them up in the air trying to injure them and slow them down.
“These kinds of high jumps are fairly typical when killer whales are attacking either porpoise or dolphins,” said Dr. Lance Barrett-Lennard, senior marine mammal scientist. “And what’s going on, they’re actually trying to strike the dolphin or porpoise from underneath because they can’t actually, as strong and as capable as they are, they can’t, it’s very hard for them to actually swim up to a swimming dolphin and grab it. Their mouth just isn’t that big.”
These orcas are known as transient killer whales, or Biggs killer whales, and eat warm-blooded prey. Resident killer whales eat salmon.
This sight, caught on video, is an unusual one, because although these interactions between orcas and dolphins do happen, it is very rare for it to happen so close to the shore.
“It will always be rare, these attacks,” said Barrett-Lennard. “Dolphins aren’t really preferred prey of the killer whales, but if I could predict I might say we might get reports of this, once or twice, or three times a year.”
This year there has been such a population boom in harbour seals and the Pacific white-sided dolphins that scientists are seeing more of Biggs killer whales coming in to our waters and close to the shore.
This interaction is a good sign of how our waters are recovering however, and a sign the marine mammals are recovering.” – Global News BC February 2014