Life on Earth

Season 1 Episode 5: Conquest of the Waters

Fish occur in populations of billions and there are over 30,000 species, more than in any other group of backboned animals. The development of the backbone was a crucial advance in evolution -and it probably came from a most unlikely source, a little jelly-like creature called a sea squirt.

Genre:

Documentary

Seasons:

1

Episodes:

13

Cast:

David Attenborough

Quality:

HD

Duration:

55 min

First Air:

1979

Rating:

9.1