Nature Communications, Published online: 21 December 2020; doi:10.1038/s41467-020-20130-2 The causes and consequences of social intelligence are challenging to establish. A study on wild cleaner fish reports that large forebrains enable individuals to score higher in a social competence test, suggesting forebrain size is important for complex social decision-making.

Source: Brain morphology predicts social intelligence in wild cleaner fish

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