Garm, A., Coates, M.M., Gad, R., Seymour, J., and Nilsson, D-E. (2007) The lens eyes of the box jellyfish Tripedalia cystophora and Chiropsalmus sp. are slow and color-blind. Journal of Comparative Physiology A: Neuroethology, Sensory, Neural, and Behavioral Physiology, 193 (5). pp. 547-557.