UK based organization who rescue stranded and sick cetaceans and other marine mammals.

Volunteer expeditions that provide resources to help sustain livelihoods and alleviate poverty through the protection, restoration and management of coral reefs and tropical forests.

All about marine life education. View hundreds of reef fish, shark and invertebrate descriptions with photographs and video clips.

Deep Ecology's unique dive operation proves that you can experience Hawaii's precious marine environment and preserve and protect it for future generations.

A library of aquarium and natural reef photographs available to publishers world wide.

To educate, inform and entertain marine life enthusiasts, scuba divers and naturalists about the underwater world.

This independent, nonprofit research organization in Sarasota, Florida, has a great deal of information about shark and dolphin research, sea turtles, other marine mammals, elasmobranchs, and other marine life indigenous to Florida waters. Site has a shark tank interactive camera.

Working for harmony between people, marine life and the environment

Contains many under water pictures plus taxonimical descriptions of the subjects and a creature search engine.

A non-profit charitable organization whose mission is to help restore aquatic ecosystems using artificial reefs and to educate people and children about the importance of aquatic ecosystems.