For over a century, biologists have puzzled over the origins of animals that first emerged in ancient oceans more than 600 ...

The sea sponges survive by feeding on the remains of worms and other extinct animals that perished thousands of years ago, they suggest. Sponges are very simple ancient animals found in seas ...

Sponges are aquatic animals that live attached to the bottom of the sea and feed on bacteria and other microscopic food by constantly filtering large amounts of seawater. We currently know more than 9 ...