Illustration from Scientific Research

The unique eye features of deep-sea Ipnops sp. and changes in genes related to eye development. A schematic representation of eye degeneration from larva to adult in Ipnops sp. is shown above, and below is a simplified diagram of zebrafish eye development. The structures indicated by the lines are anatomical features during retinal development. Red genes are absent in Ipnops sp., green genes are under relaxed selection in Ipnops sp., and blue genes have absent CNEs in Ipnops sp.

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