
Kayakers and paddlers celebrate as a whale's tail breaches the water as it prepares to dive off the coast of southern California near the Los Angeles suburb of Palos Verdes in California, USA 18 September 2010. Recently whales of many species but particularly Blue and Grey Whales are being sighted in unusually large numbers and very close to shore as they make their southern migration to breeding grounds off the coast of Baja California in Mexico. Scientists are not sure why there are so many and why they are so close to shore but the abundance of krill which the whales eat could be one of the reasons. EPA/MIKE NELSON

Kayakers and paddlers celebrate as a whale's tail breaches the water as it prepares to dive off the coast of southern California near the Los Angeles suburb of Palos Verdes in California, USA 18 September 2010. Recently whales of many species but particularly Blue and Grey Whales are being sighted in unusually large numbers and very close to shore as they make their southern migration to breeding grounds off the coast of Baja California in Mexico. Scientists are not sure why there are so many and why they are so close to shore but the abundance of krill which the whales eat could be one of the reasons. EPA/MIKE NELSON

A whale prepares to dive off the coast of southern California near the Los Angeles suburb of Palos Verdes in California, USA 18 September 2010. Recently whales of many species but particularly Blue and Grey Whales are being sighted in unusually large numbers and very close to shore as they make their southern migration to breeding grounds off the coast of Baja California in Mexico. Scientists are not sure why there are so many and why they are so close to shore but the abundance of krill which the whales eat could be one of the reasons. EPA/MIKE NELSON

A man on a surfboard watches the spray of water from a whale's blow hole as it swims off the coast of southern California near the Los Angeles suburb of Palos Verdes in California, USA 18 September 2010. Recently whales of many species but particularly Blue and Grey Whales are being sighted in unusually large numbers and very close to shore as they make their southern migration to breeding grounds off the coast of Baja California in Mexico. Scientists are not sure why there are so many and why they are so close to shore but the abundance of krill which the whales eat could be one of the reasons. EPA/MIKE NELSON