Our Plastic Giant Isopod Our plastic giant isopod is purplish and light blue, as if you were looking at it under many feet of water. As mentioned below, it looks something like a weird, segmented alien! Our isopod is less than three inches long, so it is suitable for a deep-sea diorama, as a collectible animal, or for play. Real ones are about 18 inches long. Giant Isopod Video Our giant isopod has quite the personality for something that spends its days scuttling around in the dark deep sea depths. It looks a bit like an alien and would be great as a toy or part of a school project.
A giant isopod is any of the almost 20 species of large isopods (crustaceans distantly related to shrimp and crabs, which are decapods) in the genus Bathynomus. They are abundant in the cold, deep waters of the Atlantic, Pacific and Indian Oceans. Bathynomus giganteus, the species upon which the generitype is based, is often considered the largest isopod in the world, though other comparably poorly known species of Bathynomus may reach a similar size (e.g., B. kensleyi). The giant isopods are noted for their resemblance to the much smaller common woodlouse (pill bug), to which they are related.