Cichlids have some of the most incredible visual systems known. Humans have genes that code for three different types of visual pigments, called opsins. Cichlids have seven.
慈鲷有最非凡的视觉系统。人类有这种基因，有三种不同的类型的视色素，称为视蛋白。慈鲷有七种。
Cichlids have some of the most incredible visual systems known. Humans have genes that code for three different types of visual pigments, called opsins. Cichlids have seven.
慈鲷有最非凡的视觉系统。人类有这种基因，有三种不同的类型的视色素，称为视蛋白。慈鲷有七种。
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