Season 1

Discover the most fantastic city of them all lying beneath the waves, where romance and migratory commuters flood the coral reef's main highways.

Feel the heat of summer's arrival as supersize sea snails try to fend off an invading gang of coral-hungry starfish and more ... Coral City. Episode 2. 50 min NOW.

Adapt or perish in the coral streets as higher-than-normal temperatures make autumn cooling (and survival) more difficult.

Get chills as winter descends, slowing down life on the bustling reef. Meander with reef sharks and octopuses, visit a coral oasis atop an old shipwre…