This crinoid is swimming through the water by alternately raising one set of arms while lowering another, in a flapping fashion. Crinoids move very slowly on their own, but the current provides plenty of additional movement. Why do you think think movement is important to the survival of a modern crinoid? Visit the feather star page on the site "Welcome to the Cambrian: A Tour of the Origins of Animal Life" by Kerry B. Clark to find out. back to crinoid creature thumbnail page