When they're still young, he says, farmers toss animal waste in the ponds and allow the tilapia to feed on the algae bloom that follows.

它们还是鱼苗的时候，他说，农户会往鱼塘里扔动物粪便，并让罗非鱼以由此催生出的大片水藻为食。

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But during a brief span between the wet and dry seasons, when the water level is just right, the many varieties of algae and moss bloom in a dazzling display of colours.

但在一间潮湿，短短旱季，当水位恰到好处，藻类和苔藓盛开在令人眼花缭乱的色彩显示许多品种。

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