The Tirrith were an energy-based species of hive-minded sentients indigenous to Beheboth. Unlike most species of the galaxy, the Tirrith existed in gaseous form. Behoboth was a sparsely-inhabited backwater world, so the peculiar species were rarely studied; the galactic scientific community, by the time of the Galactic Civil War, had not yet reached a conclusion about whether the Tirrith represented a single huge group consisting of almost 17 million individuals, or several thousand colonies of anywhere from a few dozen to hundreds each.