Male guppies that glow with more orange aren’t just fashion-forward — they’re also significantly more sexually active. A UBC study reveals that brighter coloration is linked to virility and is genetically tied to brain development, suggesting a deeper evolutionary function. Researchers found that these bold hues aren't just for attracting mates, but are rooted in a vast, multi-chromosomal genetic system that enables tens of thousands of possible color pattern combinations. The work sheds light on how vibrant displays, behavior, and genetic fitness are intertwined in evolution.
source https://www.sciencedaily.com/releases/2025/07/250710113149.htm
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