This suggests that animals with more widely spaced nostrils could attack from better positions while swimming fast.

VOA: special.2010.08.03

If you're a bacterium your whole life is about swimming to nutrients and running away from things that would kill you.

假如你是一个细菌,你的一生将会在追逐养分,和逃避敌害中度过

耶鲁公开课 - 生物医学工程探索课程节选