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Sponges: Oldest Creatures in the Sea? - Full Episode
Sponges: Oldest Creatures in the Sea? - Trailer
How One of the Oldest Animals in the World Constantly Rearranges Their Insides | Alien Ocean
The Mysterious Realm of Deep Sea Sponges
Sponges are the oldest living animals on Earth
The 8 oldest animal species on Earth
How Earth's First, Unkillable Animals Saved the World
Precambrian Creatures: The First Animals
Sea Sponge Facts - The Living Breathing Skeleton - Animal a Day
All About Sponges
The New Oldest Animal Fossils?
The largest sponge in the world (Rossellidae, Lanuginellinae)
