GNAT2 and retinal degeneration: Changes in the expression of crx have also been implicated in the retinal degeneration of Astyanax and Sinocyclocheilus cavefish (Jeffery, 2009; Meng et al., 2013; Mcgaugh et al., 2014; Yang et al., 2016), and in the present study, we detected the downregulated expression of this gene and associated downstream transcription factors (e.g., gnat2 and nr2e3).