Resources:

Cod: the Biography of the Fish That Changed the World -
by M. Kurlansky (New York: Penguin, 1997) - here is a small book, suitable for high school students, that combines marine and fishery science, history, economics, and interesting recipes in a remarkable book about a remarkable fish.

OCEANWORLD (Fisheries and El Nino) -
an educational website created by the TOPEX/Poseidon Education Team at Texas A&M University through funding by NASA
http://oceanworld.tamu.edu/
Click on "Fisheries" and "El Nino".

Visit to an Ocean Planet (Life: Human Interactions, Life: Systems & Interactions, and Oceans: Process & Change) -
an Educational CD-ROM - produced by the TOPEX/Poseidon Project: (JPL - NASA) You may order a free copy of this CD-ROM.
Just visit: http://topex-www.jpl.nasa.gov/educational/cdrom.html