basket stars (euryalids) are large brittle stars with many rays. their arms branch, and can be moved in any direction. this distinguishes them from the ophiurids. basket stars may be capable of suspension feeding, using the mucus coating on their arms to trap plankton and bacteria. they extend one arm out and use the other four as anchors. the arms form so many branches that they are almost feathery on the ends. they get their name because when they stretch their rays out to catch plankton, they look like the bottom of a basket.