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A N TA R C T I C W I L D L I F E

baleen, tiny animals are caught and sent to the whale’s stomach; the water passes out of the whale again. Humpbackwhales are found inmany places around theworld, but many of themspend some time each year inAntarctic waters. Like blues, they are filter feeders that use baleen. Humpbacks have been famous for their communication skills. Scientists have recorded these whales using sounds that seems to be signals to other humpbacks. There are different kinds of calls, or songs, for different situations. Some experts theorize that humpbacks can identify individuals from their songs, too.

This humpback is demonstrating the filter feeding behavior. Its huge mouth sucks in seawater—fish, krill, and all—and its baleen takes the fish and releases the water.