Grab your wetsuit! We're going deep into an underwater world of incredible coral and mysterious sea creatures.
Look at live streams of local aquariums if you can. Can you pick a favourite fish, plant or animal?
What do divers get up to below the surface? How do submarines work and how do they help us discover more abut this mysterious underwater world?
What are those bright lights in the distance? Bioluminescent creatures inhabit the depths of the oceans. Can you discover what makes them this way?
Flippers on? Snorkel ready? Let's head deep into the Blue Abyss.....