1 Department of Biology, University of Maryland, College Park, MD, 20742 USA. E-mail: jeffery@umd.edu.
2 Cave Fish Development and Evolution Research Group, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, 650223, China. E-mail: mali@mail.kiz.ac.cn.
3 Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China. E-mail: zhaoyh@ioz.ac.cn.