The Latin word “hippopotamus” is derived from the ancient Greek ἱπποπόταμος, hippopotamos, from ἵππος, hippos, “horse”, and ποταμός, potamos, “river”, meaning “horse of the river”. In English, the plural is “hippopotamuses”, but “hippopotami” is also used; “hippos” can be used as a short plural. Hippos are gregarious, living in groups of up to thirty animals. A group is called a pod, herd, dale, or bloat.
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