In fact, scientists had been thinking for a long time that African cichlids might have a good memory.
事实上，科学家们过去一直认为非洲慈鲷可能有很好的记忆力。
In the study, researchers from Mac Ewan University in Canada trained a kind of fish called African cichlids to go to a certain area of their tank to get food.
在这项研究中，加拿大麦科文大学的研究人员训练了一种叫做非洲慈鲷的鱼，让它们游到鱼缸的特定区域获取食物。
Scientists in the U.S. and Switzerland were studying the cichlids that live in African lakes.
美国和瑞士的科学家研究了非洲湖泊中的棘鳍类热带淡水鱼。
And the descendants of that fish, now called cichlids, continue to swim the fresh waters of both Africa and South America.
那鱼的后代，现在叫鲷，继续游在非洲和南美洲的淡水水域里。
The cichlids have evolved in different shapes and sizes, and with a variety of jaw types specialized for eating certain kinds of food.
丽鱼进化出了不同的形状和大小，以及不同种类的下颚，用以专门摄取不同种类的食物。
Escobar-Camacho analyzed DNA from three different Amazonian cichlids: the freshwater Angelfish, the Discus, and the Oscar, all of which are also popular in home aquariums.
Escobar Camacho分析了来自亚马逊慈鲷的三种后代的不同dna：淡水神仙鱼、铁饼和奥斯卡，所有这些也都是很受欢迎的家养宠物。
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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