Becky and Emily head for the coast to fish for blennies and get very enthusiastic about pufflings. They find a sea lion band of brothers, a multicolour rock pool and learn the ins and out of tides.
They hear from producer of Blue Planet II Episode 6, Miles Barton who reveals the riches of the ever changing coastline. In this episode, he aimed to show the animals from their perspective and bring us into their world.