Social ties are maintained through sensory adaptations in green chromides

Green chromides (Etroplus suratensis) keep stable visually mediated conspecific preferences across sequential white- and blue-light environments, despite retinal opsin plasticity and Cyp27c1 downregulation.

• Why it matters: It is unclear how environmentally driven changes in visual gene expression translate into social behaviour, especially in species that use vision to choose conspecifics.
• What they did: Using retinal transcriptomics, then measuring behaviour and gene expression at regular intervals under sequential white and blue light, the study tracked rod and cone opsins and the chromophore-related gene Cyp27c1.
• The result: Under blue light, LWS increased while short wavelength-sensitive opsins stayed unchanged, and Cyp27c1 expression declined, implying multiple retinal molecular shifts that do not straightforwardly alter social preference.

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