Whales! We had almost daily sightings of killer and humpback whales. Bubble net feeding is a new phenomenon in Antarctica – passed along from a random northern humpback whale, in which a group of whales swim in a shrinking circle blowing bubbles below a school of krill. This column of bubbles surrounds the krill, forcing them upward. The whales spontaneously swim upward through the bubble “net”, mouths wide open, catching thousands of krill in one gulp.