Segment 1: Saving the Sturgeon. Jonathan travels to upstate New York to learn how biologists are working to save the sturgeon in the St. Lawrence River by rebuilding their spawning habitat and re-stocking the river. During a dive he films an amazing spectacle that has never been recorded before! Segment 2: Coral Farming in Key Largo. Jonathan visits an underwater farm in Key Largo where they grow coral! He joins the staff of Coral Restoration Foundation in helping to transplant and propagate staghorn coral, which has become threatened in the Keys.