The Blue Planet - Season 1 - Eps 5: Seasonal Seas
As the days grow longer, billions of microscopic plankton bloom under the blazing sun. Here in the temperate seas, three-ton basking sharks graze among forests of giant kelp - the fastest growing plant in the world. The forests harbor thousands of other animals, including sea otters, brilliantly colored anemones, squid, and exquisite leafy dragons. But as the year wears on, storms rage in the icy sea... a desperate challenge for the animals that remain.
About The Blue Planet

Title: The Blue Planet
First Air Date: 2001-09-12
Last Air Date: 2001-10-31
Status: Ended
Rating: 8.3/10 (from 347 votes)
Language: EN
Seasons: 2
Total Episodes: 8
Network: BBC One
Genres: Documentary
Production Companies: Discovery, BBC, BBC Television Centre
Synopsis
Sir David Attenborough narrates this critically acclaimed series that dives deep into the marine environment of Planet Earth. Although two-thirds of the world's surface is covered with water, scientists know less about the oceans than they do about the surface of the moon. This limited series travels from various coasts to the poles to examine watery denizens ranging from the gigantic blue whale to microscopic coral polyps.
Cast

David Attenborough
Self - Narrator (voice)