LYCOS RETRIEVER 
Whales (Ecotourism): Sperm Whales
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Whales breathe through blowholes, located on the top of the head so the animal can remain submerged. Baleen whales have two; toothed whales have one. The shapes of whales' spouts when exhaling after a dive, when seen from the right angle, differ between species. Whales have a unique respiratory system that lets them stay underwater for long periods of time without taking in oxygen. Some whales, such as the Sperm Whale, can stay underwater for up to two hours holding a single breath. The Blue Whale is the largest known animal that has ever lived, at up to 93ft long and 180 tons.
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Whales are considered by many to be the most magnificent and intelligent of the Antarctic marine mammals. Members of the order Cetacea which includes dolphins and porpoises, whales are divided into two groups: toothed (Odontoceti) and baleen (Mysticeti). Toothed whales have narrow jaws lined with peg-like teeth which they use to catch fish, squid, and other marine mammals, swallowing them whole. They are smaller than baleen whales and only have one blowhole. The Killer (Orca) whale and the Sperm whale are the only toothed whales found in the Antarctic region. Baleen whales have comblike structures instead of teeth that are used to filter krill and fish from the water.
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Completely adapted to life in the water, whales breathe through blowholes on top of their heads, which allows them to take in air without interrupting swimming. Of the great whales, the deep-diving sperm whale is the champion at holding its breath. The longest recorded dive by a sperm whale lasted over an hour, and these whales can descend to depths of more than a mile. Unlike fish, which swish their tails from side to side, whales swim by pumping their tails vertically, and using their flippers to steer.
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Rolf is photographing whales for a long time. He started photographing Orca Whales of the British Columbia coast and extended over many years his photography portfolio to many other whale species like Humpback Whales, Beluga Whales, Sperm Whales and others.
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The problem with using a size differentiation to discuss whale types starts with the fact that one of the toothed whales, the sperm whale, grows up to sixty feet in length. It is commonly the only toothed whale species to be included in the great whale category.
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"Deep-water sperm whales (think Moby Dick) and blue whales swim among these islands. Live aboard ship on the nine-day trip for a unique marine experience. Departures in April, May, September and October." 800-397-3348; expeditions.com.
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Sperm Whales