Cachalot is a fictional planet created by Alan Dean Foster for his Humanx Commonwealth universe. The world is almost entirely covered by ocean with small ice caps and a few artificial floating islands created by humans. The dominant non-native races are intelligence-enhanced Cetacea (includes whales, dolphins, orcas and porpoises) that were brought to the planet from Terra in 2300 A.D. The name of the planet derives from the Portuguese word cachalote, a common term for head. This word was applied to the sperm whale, for its large head, when the mammals were actively hunted in Earth’s oceans.