Jonathan Bird's Blue World - Season 4 Season 7 Episode 1 Giant Cuttlefish in South Australia + Blue Grotto Sinkhole in Florida, USA

Blue World's host, Jonathan Bird, travels with his entire family to South Australia to witness the Giant Cuttlefish spawning event, where thousands of Giant Australian Cuttlefish gather in the largest known cuttlefish aggregation in the world. Blue World then heads to Florida to check out the Blue Grotto, a sinkhole with amazing underwater visibility and a mysterious cave.