The rare recording shows that the big mammals are picky eaters, and they won't consume the meal, unless its size is worth their effort.
The 82-foot blue whale skeleton at the University of British Columbia's biodiversity museum was the subject of a 2011 Discovery Channel segment that hinted largely at terrible smells while the whale was being unearthed in eastern Canada. Recently, the skeleton received its first big cleaning.
A recent study found that there's a "magic number" of krill for blue whales to find in order to gather enough energy for their massive bodies. If they don't find the tiny food sources in concentrated supply, the whales have to hold their breaths more and do more gathering.