Coral reefs are home to a quarter of all marine species. Survival in these undersea mega-cities is a challenge with many different solutions. A turtle heads to the reef's equivalent of a health spa - but she must use trickery to avoid the queue. A remarkable Grouper uses the fish equivalent of sign language to collaborate with an octopus, flushing their prey out of hiding holes. A metre-long, ferocious-jawed Bobbit Worm hides in its tunnel. Monocle Bream retaliate by squirting water to expose its sandy lair.

Blue Planet II Season 1 Episodes...

• s01e01 - One Ocean
• s01e02 - The Deep
• s01e03 - Coral Reefs
• s01e04 - Big Blue
• s01e05 - Green Seas
• s01e06 - Coasts
• s01e07 - Our Blue Planet

Blue Planet II Show Summary

World-renowned naturalist Sir David Attenborough returns to present this landmark seven-part series about our planet's oceans. Blue Planet II explores the latest frontiers of scientific discovery, from icy-white polar seas to vibrant blues of the coral atolls, from the storm-tossed green Atlantic coastline to the black depths of the alien deep.