No one's immune to mosquito bites — not even killer whales. Reports of captive killer whales dying of deadly mosquito-borne viruses are proof that these irksome insects have a taste for cetacean seafood. In 1990, the 25-year-old male orca Kanduke died at SeaWorld Orlando after contracting an encephalitis virus from a mosquito. In 2007, a 14-year-old male whale called Taku died of West Nile Virus at SeaWorld San Antonio. So far, there have been no reports of wild killer whales catching lethal viruses.
Scientists now think the captive whales are at risk partly because of the shallow pools they inhabit, where there body parts are exposed to the air and pesky insects, the researchers report in the current issue of the Journal of Marine Animals and Their Ecology, ScienceNOW writes. When it comes to mosquito bites, surface area is not working in the whales' favor. You'd need a lot of bug repellant to protect a creature that size.