Skullcrawlers got their
name from their skull-like heads and their crawling locomotions. Their true
name is known as "Halakrah", or "Persistent Enemy", but unspoken by the Iwi, and the
name "Skullcrawler" was invented by Hank Marlow as he explained their history to Mason Weaver and James Conrad. While initially lacking an official Titanus designation, by the time of Godzilla vs. Kong, the Skullcrawlers have been designated as Titanus Cranium Reptant, which is inaccurate given the opening had many inconsistencies due to production delays.3 While in the latter the
name of a Adult Skullcrawler, one of them is nicknamed as Number 10 by
Walter Simmons
Skullcrawlers are subterranean
pack-hunting predators with insatiable appetites that are the results of their heightened metabolisms. Because of this, it is suggested that
male and female Skullcrawlers
will almost always devour each other after mating. They are highly aggressive, as well as incredibly persistent in pursuing their prey. They do, however, show a high degree of intelligence (as Hank Marlow calls them "crafty bastards"), shown when the largest of the Skullcrawlers refused to devour a grenade-armed Earl
Cole and simply swats him away. Juvenile Skullcrawlers appear to be naturally fearless, as two of them teamed up to attack
Kong despite being smaller and out-muscled.