Spike Goo is a species of Goo found in the video game World of Goo. This yellow Goo appears in only two levels, The Third Wheel and Water Lock. They can stick to any non-spiky surface and can have four legs maximum. Like Green Goo and Skull Goo, they can also be detached from a structure. However, they cannot enter any pipes, nor can it activate a pipe. In addition, loose Goo will not travel on the Spike Goo's attachments.