Fish are a major food source for other aquatic organisms, but humans as well.  What can be done in order to help fish survive, thrive and still be abundant enough to feed a growing population?  Philippe Cousteau hears from experts, Dr. Louise Firth, Dr. Daniel Merrifield, and Justin Ruscombe-King about the innovative work being done to help fish populations stay healthy for generations to come.  Philippe visits an engineering habitat and an aquaculture farm to learn how we can take action to help save our fisheries.