Do fish affect the carbon levels in the sea/ocean area around them? If so, how?

Question: Do fish affect the carbon levels in the sea/ocean area around them? If so, how?
- Keywords:
  carbon,
  fish,
  ocean,
  sea
Asked by ivyscience01 to Carol, Ellie, John, Philip, Rebecca on 1 Jul 2012. This question was also asked by zrice3.
- Carol White answered on 1 Jul 2012:
  
  Yep, by eating anything that has carbon in it (nearly everything does!). When they die, they release the carbon back into the environment, just like trees… underwater!

ivyscience01 commented on 2 Jul 2012:

Wow… a life cycle of carbon… interesting!

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Question: Do fish affect the carbon levels in the sea/ocean area around them? If so, how?