Zebrafish has recently become an emerging vertebrate model for circadian studies. Here we summarized recent advances in the field of zebrafish circadian research. The characteristics and advantages of zebrafish as a circadian model, as well as its time-keeping mechanisms, were highlighted. Because light and temperature as external time cues both play important roles in the circadian regulation of zebrafish, we focused on recent studies concerning the effects of light and temperature on circadian clock genes and circadian regulatory pathways in zebrafish. We also provided the perspectives on prospective zebrafish circadian studies.
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