This tiny Clingfish, about 3/4 inch long, is unique among fishes. Clingfish have a jointed neck that enables them to turn, lift, or lower their head. They always position themselves in a manner that mimics the look of the arms of the crinoid, maximizing their own security among the arms of the host. Identification of Clingfish: Discotrema crinophila back to crinoid creature thumbnail page