In the near-surface layers, there are many large, fast carnivores as well as an immense variety of planktonic animals, which feed on plankton (small, free-floating plants or animals) by filtering them from currents of water that pass through a specialized anatomical structure. These filter-feeders thrive in the well-illuminated surface waters because oceans have so many very small organisms, from bacteria to large algae to larval crustaceans. Even fishes can become successful filter-feeders in some circumstances. Although the vast majority of marine fishes are carnivores, in near-surface regions of high productivity the concentrations of larger phytoplankton (the plant component of plankton) are sufficient to support huge populations of filter-feeding sardines and anchovies.
这个题出的非常坑爹了。2分钟内要理解正确真的难。
fast carnivores as well as an immense variety of planktonic animals, which feed on plankton
Although the vast majority of marine fishes are carnivores, in near-surface regions of high productivity the concentrations of larger phytoplankton are sufficient to support huge populations of filter-feeding sardines and anchovies.
A选项大多数鱼错，实际上吃phytoplankton的鱼，文章只说了 filter-feeding sardines and anchovies。而不是most fish。实力坑啊
这道题在于Even的反推。
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