Mastodon head variations2

The fireback mastodon is one of the largest land animals discovered on Pandora thus far, with adult males frequently exceeding the size and weight of zakru and various subspecies of goliath.

Possessing typical hexapod physiology and heavy musculature; the mastodon has a thick, patterned hide which ossifies into armored scales at the thighs and flank. Strikingly, the mastodon displays a sharp, brightly colored bone ridge that protrudes from the front of the skull, commencing at a crest which continues down the animal's spine, terminating at the tail.

The head of the mastodon is reminiscent of Terran Loxodonta. Its curved and serrated tusks are primarily used to strip bark from trees, which along with fruit forms the bulk of the mastodon's diet.