what is the oldest living animal
New Scientist Live: This deep-sea creature could be the worldâs oldest living animal. Deep in the waters off the Northwestern Hawaiian Islands lurks a 3.5-metre-long behemoth â the worldâs largest known sponge that could be hundreds, if not thousands, of years old. Sponges are some of the simplest and most ancient of animals, though they donât look like animals as we usually know them.