Following the success of Planet Earth II (coming soon to a Snapchat app near you), the BBC has announced its latest nature-doc extravaganza: a sequel to the award-winning series The Blue Planet. As the name suggests, the show will focus on the variety of wildlife found in the Earth’s seas and oceans. Blue Planet II will air in the UK later this year (hitting US screens some time after presumably), and will feature the narrating talents of naturalist icon David Attenborough.

“I am truly thrilled to be joining this new exploration of the underwater worlds which cover most of our planet, yet are still its least known,” Attenborough, who turns 91 this May, told BBC News. James Honeyborne, executive producer for the series added: “The oceans are the most exciting place to be right now, because new scientific discoveries have given us a new perspective of life beneath the waves.”

The Blue Planet II crew have been working on the seven-part series for the past four years, and utilize a number of new camera technologies to get their footage. These include suction cameras attached to the backs of whale sharks and orcas, probe cams for recording miniature marine life, and “tow cams” that are trailed behind filming craft to capture dolphins and predatory fish head-on.

Some of the animals being featured in the new series include water-spitting snub fin dolphins, the tool-using tusk fish, and a hairy-chested crab that goes by the nickname “The Hoff.” You can check out a clip from the original Blue Planet, which first aired in 2001, to whet your appetite: