Behemoths (Japanese: ベヒモス, Behimosu) are a powerful monster family in Xenoblade Chronicles. Behemoths can be found at Valak Mountain and on Prison Island. On Prison Island there is a Behemoth Nest, where they can be seen in abundance.
The strongest Behemoth, a level 114 Blizzard Belgazas, is the second strongest monster in the entire Xenoblade Chronicles world.
They seem to be related to the Mammut family with a lot of the same attacks or similar ones.