Big blue mouthful by Doc White. “This picture was the first ever to show, full frame, a blue whale with its throat pouch expanded, the pleats forced open by the engulfment of a gargantuan amount of water and shrimp-like krill. Having lunged through the krill swarm, the whale is expelling the water, forcing it through the massive sheets of hair-like baleen material, which hang from its mouth. To find large enough aggregations of krill, a blue whale is forced to travel great distances. But when a large swarm is located, the lunge-feeding technique is highly energy-efficient”.