The Incredible Shrinking Cups: on the absence of giant tube worms Posted on April 26, 2013April 5, 2013 By Andrew Thaler No Comments on The Incredible Shrinking Cups: on the absence of giant tube worms Science It’s true! There are no giant tube worms (Riftia pachyptila) at the Mid-Cayman Spreading Center (but there are smaller tube worms). No Tubes. What all this about?