The rusty millipede is originally from Southeast Asia, but has been introduced to many parts of the world, including St. Martin. Millipedes have two pairs of legs per body segment, because each body segment is basically to segments fused into one. They mostly eat decaying organic matter, and the descendants of the millipedes were probably one of the first animals to venture onto land. One of their defense mechanisms, as you can see here, is to roll into a coil, so their underside is protected by the plates on their back.
