Mantas of Yap - Jonathan travels to the Micronesian island of Yap in the middle of the Pacific to investigate large gatherings of the world's largest ray-the manta. A research program there is tracking dozens of these animals and Jonathan learns what they're doing hanging around certain coral heads every morning. Tropical Fish Rescue - Millions of fish eggs from the Caribbean get stuck in the gulf stream every year and drift thousands of miles north where they hatch. Unfortunately, when winter comes, the baby fish will die. Jonathan joins the New England Aquarium Dive Club on a tropical fish rescue in Rhode Island where they catch some of these fish in the fall before water temperatures plummet. The fish go to the New England Aquarium's exhibits. Tigers of the Sea - On an expedition to the Bahamas, Jonathan encounters dozens of Lemon sharks while trying to film a Tiger shark. But finally a Tiger shark arrives and you won't believe the incredible encounter Jonathan has with this enormous, hungry animal.