http://www.calstatela.edu/faculty/eviau/edit557/oceans/linda/loceans.htm
Ocean Life for Kids: A simple site with games and questions for children to answer. Simple facts about some sea creatures.

http://www.oceanexplorer.noaa.gov/
Extensive gallery of images and sounds from under the ocean.

http://www.enchantedlearning.com/subjects/sharks/
Interesting facts and activities about sharks.

http://www.nmfs.noaa.gov/pr/education/whales.htm
Downloadable pdf files about whales.

http://www.sheppardsoftware.com/content/animals/quizzes/kidscorner/
animal_games_water_surface_btn_large.html
An animated game to classify ocean life. Fast and fun.