Whale researcher Janie Wray vividly remembers the first time she saw humpbacks bubble-net feeding on the northern B.C. coast more than 20 years ago. First, the mournful calls begin at depth, followed by a perfect ring of bubbles rising through the water. Moments later, herring scatter and flash as they leap from the ocean, as up to a dozen humpbacks surge upwards in unison, breaking the surface with their maws agape.