Elenco (na ordem dos créditos)
Avery Brooks
Narrator (voice)
Charlie Paull
Self - Monterey Bay Aquarium Research Institute
Tim Le Bas
Self - National Oceanography Centre, Southampton
Craig Dawe
Edith Widder
Self - Ocean Research and Conservation Association
John R. Smith
Self - Hawaii Undersea Research Laboratory
Christopher Kelley
Frank Parrish
Self - National Oceanic and Atmospheric Administration
Gregor P. Eberli
Self - Rosenstiel School of Marine and Atmospheric Science
David Schwartz
Self - US Geological Survey
Vicki Ferrini
Self - Lamont-Doherty Earth Observatory
Crispin Little
Self - University of Leeds
Cindy Lee Van Dover
Self - Duke University Marine Laboratory
Peter Talling
Bruce Applegate
Self - Scripps Institution of Oceanography