I have heard of whales creating a "net of bubbles" to trap their prey, but had never seen it until just recently. I watched as a pod of whales would dive and exhale to create a string of bubbles 50 or 60 feet in diameter, with the individual bubble patches themselves being 6 feet or so in diameter. When the circle was complete, the whales would swim through and swallow their prey. Birds would also appear to feast on the prey. Here are a few shots showing that action. C&C welcome. Richard 1.