Watch The Blue Planet Season 1 Episode 4: The Deep Online

	IMDB Rating: 9.2/10 from votes
	Release: 2016 / The Blue Planet / Season 1 / Episode 4
	Genre: Documentary
	Director:
	Stars:
	Synopsis: The deep sea, which gets darker till no more sunlight penetrates at about a kilometer depth, and ever colder closer to the bottom of the ocean, covers most of the planet and is thus by far the largest habitat on earth, yet has been explored less then space, so most scientific expeditions, at some depth requiring modern submarine technology, discover at least one new species, or even whole new branches of submarine life. Like everywhere else, evolution has over millions of years produced several amazing adaptations to even the most extreme conditions, here especially to the lack of sunlight, with its problems for procreation, searching food and fleeing hunters, such as photophore cells which produce specific light types, mimic rare light penetrating from above, etcetera.