title: Comment on "Open-ocean fish reveal an omnidirectional solution to camouflage in polarized environments".
abstract: Brady et al (Reports, 20 November 2015, p. 965) claimed that the silvery sides of certain fish are cryptic when viewed by animals with polarization sensitivity, which they termed "polarocrypsis." After examining their evidence, we find this claim to be unsupported due to (i) pseudoreplication, (ii) confounding polarization contrast with intensity contrast, and (iii) measurements taken at very shallow depths.
authors: Department of Biological Sciences, University of Maryland, Baltimore, MD 21250, USA. cronin@umbc.edu.
authors: Thomas W
authors: TW
authors: Cronin
authors: Queensland Brain Institute, University of Queensland, Brisbane St Lucia, QLD 4072, Australia.
authors: Yakir Luc
authors: YL
authors: Gagnon
authors: Biology Department, Duke University, Durham, NC 27708, USA.
authors: Sönke
authors: S
authors: Johnsen
authors: Queensland Brain Institute, University of Queensland, Brisbane St Lucia, QLD 4072, Australia.
authors: N Justin
authors: NJ
authors: Marshall
authors: School of Biological Sciences, University of Bristol, Bristol, BS8 1TQ, UK.
authors: Nicholas W
authors: NW
authors: Roberts
mesh_terms: D000818:Animals; D017753:Ecosystem; D004777:Environment; D005399:Fishes; D008027:Light; D009792:Oceans and Seas