As climate change impacts marine ecosystems, fish must migrate or adapt and eventually speciate to preserve their diversity. Research now shows that warming has coincided with reduced fish body size throughout evolutionary history, hindering both preservation strategies.

中文翻译：

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鱼类多样性的双重危险

随着气候变化影响海洋生态系统，鱼类必须迁移或适应并最终形成物种以保护其多样性。现在的研究表明，在整个进化历史中，变暖与鱼体尺寸的减小同时发生，这阻碍了这两种保存策略。