Based on fossilized eyes from the Emu Bay Shale, which belonged to "Anomalocaris briggsi" (which, based on morphological and phylogenetic evidence, was more closely related to "Tamisiocaris"), the eyes of "Anomalocaris" were 30 times more powerful than those of trilobites, long thought to have had the most advanced eyes of any contemporary species. With 16,000 lenses, the resolution of the eyes would have been rivalled only by that of the modern dragonfly, which has 28,000 lenses in each eye. Additionally, "Anomalocaris" had dichromatic colour vision.