Warming waters could mean smaller fish

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Photo: Laszlo Llyes Flickr

Fish will struggle to breathe as the ocean waters warm, researchers say, and bigger fish will have bigger problems.

That means important species could soon top out well short of their current sizes—shrinking fisheries and potentially causing problems up the food chain.

Fish have proved sensitive to subtle changes, and higher temperatures could present them with two problems—a change in the water and a change in their biology.