LOL! Those are Camel Spiders. What you see there are two spiders together, dangling.
They are found in arid locales all over the world — including the southwestern United States — not just in the Gulf region. A typical specimen can grow to about the size of a child's hand, but, though they are known for being vicious predators (see video), camel spiders are neither venomous nor a threat to human beings.
They don't eat camels, either.
Video on Camel Spiders