Marine biologist-filmmaker Rick Rosenthal documents billfish (marlins, sailfish and swordfish), whose numbers have dwindled over the past 50 years from overfishing. Included: off Mexico's Contoy Island, he finds thousands of sailfish feasting on sardines; and along Australia's Great Barrier Reef, he swims with a "grander" (a marlin over 1000 pounds).
Genres: Documentary , Family
Keywords: animal-kingdom , animal-species , animals , animals-nature , environmental , helping-animals , knowledge , love-of-animals , nature , nature-documentary , people-and-nature , wildlife , latest-episodes , latest-web-series-online , tv-shows-online