Scientific name: Xestospongia muta
Taxonomy: Kingdom Animalia → Phylum Porifera → Genus Demospongiae → Subclass Heteroscleromorpha → Order Haplosclerida → Family Petrosiidae → Genus Xestospongia
Locations: Caribbean
Group: Marine Life → Invertebrates → Sponges
Giant barrel sponges are tough, but not indestructible. They also grow very slowly; large ones can be 2000 years old. A carelessly knocked off chunk will take a lifetime to grow back.