Science is Fun Fridays!
The world's largest known sponge has been found in the Pacific Ocean near Hawaii. It is more than a mile down, and is roughly the size of a minivan. Sponge are multicellular invertebrates, and this is a colony of them which has likely been growing for a long time. Scientists were able to examine microscopic skeletal structures, called spicules, to confirm it is a member of glass sponges called Rossellidae. They're called glass sponges because the skeleton is made of delicate silica. Sponges are filter feeders, which benefits the surrounding ecosystem.