What constitutes a crown-of-thorns starfish outbreak?
Engelhardt, U., Miller, I., Lassig, B., Sweatman, H. & Bass, D. 1997, Crown-of-thorns starfish (Acanthaster planci) populations in the Great Barrier Reef World Heritage Area: status report 1995-96, In Technical Workshop on the State of the Great Barrier Reef World Heritage Area, Townsville, Queensland (Australia), 27-29 Nov 1995, eds. D. Wachenfeld, J. Oliver & K. Davis.