The strategy of orientation in the barnacle Balanus trigonus. Drummond, Ainslie H., Jr. 1968. Corals may be the key in combating bio- fouling. Hoffman, Robert K. 1971. McHugh, J. L. 1986.
Whales have riders, too.
Southward, A. J. and D. J. Crisp. I, Cata- logue of marine fouling organisms. Organization for Economic Co-operation and Development. Stewart, V. N. 1979. Barnacles and hormones.