Sponges: Oldest Creatures in the Sea? -
changing seas

Shows how recent DNA research has cast doubt on the theory that sponges were the first animals to branch off the "Animal Tree of Life, " a kind of family tree for all living and extinct animals on earth. Recently, some scientists are suggesting that ctenophores, also known as comb jellies, are an older lineage.

Episode Duration: 26 minutes and 46 seconds

Episode Number: 801

No future air times were found for this episode.

About Changing Seas:

CHANGING SEAS takes viewers on an exciting adventure to the heart of our liquid planet.

The documentary series offers an unprecedented look at how oceanographers and experts study earth's vast underwater wilderness, while shedding light on how over-fishing, global climate change and pollution threaten ocean resources.

Watch Changing Seas - Clips, Episodes & Previews

Sponges: Oldest Creatures in the Sea? - Trailer

Sharks in Belize: Jaguars of the Sea

The Cordell Bank: A National Treasure - Trailer

Habitats: The Key to Florida's Fisheries

Living Fossils - Trailer

Recreational Shark Fishing: Collaborating for Conservation

Future Broadcast times for "Changing Seas": (show all)

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