Season: 19 | Episode: 8 | Length: 60m

As the team celebrates our seas, Gillian Burke ventures down the Llyn Peninsular and explores a seagrass meadow. Iolo Williams is poised on Swanage Pier to showcase an overlooked species that beneath these very waves, in Spring, puts on quite the display. Meanwhile, Chris Packham and Michaela Strachan continue to explore the array of wildlife at RSPB Arne in Dorset.