Board Thread:Questions and Answers/@comment-5602817-20140613202608/@comment-25085317-20140621062613

Blaziken rjcf wrote: They might be a different material, but they are definitely part of his body. It might just be that they're darker because they absorb more light, since there's more of the same material between the light source and "our eyes" (our point of view). They might be denser than the light green goo that is present on the surface of his body. They might be important for Goop to be more stable (like an exoskeleton).