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. 2018 Apr 18;8:6174. doi: 10.1038/s41598-018-24579-6

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© The Author(s) 2018

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Effects of light environment on skin color of all 24 species of crocodylians. Animals maintained in black tanks were measured, placed in a white tank and measured again after three hrs. (A) Members of the Family Crocodylidae show relative strong color change, except for the African slender-snouted and African dwarf crocodiles. (B) Members of the Family Alligatoridae do not exhibit color change while members of the Family Gavialidae (C) change in the opposite manner to the crocodylids. The data represent the means ± standard deviations for the number of animals indicated on each graph. *Statistically different from measurements of skin color of the same animals in dark tanks.