Here are some links to information which you will find helpful and concise.

Scuba Diving Hand Signals

Click Here for Equipment Maintenance Tips

Scuba Diving Hand Signals Every Diver Should Know

Flying After Diving

Never Hold Your Breath!

Buddy System

10 Tips for Underwater Photographers

Seafood Watch downloadable pocket guides

Seafood Watch Website

Monterey Bay Aquarium

Denver Aquarium

Aquarium of Boise

Shark Information

Shark Finning - madness that has to stop!