Among the other applications of the same genetic technology, one has been on the market for several years: a beautiful ornamental aquarium fish called the Glofish, a zebra fish genetically altered to make it fluorescent.

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That will make the Belo Monte story even more interesting: big corporate government and miners seek to destroy the livelihood of tens of thousands, possibly extincts some fish like the zebra catfish, according to studies, and floods virgin rainforest in the name of development and future mining profits.

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If predators are able to operate only in the same number of dimensions as their prey as is the case for lions and zebra, or barracuda and schooling fish then individuals at the centre of a group really should be safer than those at the edges.

ECONOMIST: Animal behaviour