Brontoscorpio was a large amphibious arthropod from the Silurian. It is related to modern day scorpions. It crawled on the bottom of the Silurian sea hunting for worms and other Arthropods. It is believed they where capable of coming onto land. During molting periods it is vulnerable to attacks, it to is unable to eat while molting. It did not had much of a brain only to rely on basic instincts.