animalia: Porifera: Demospongiae: Halisarcida: Halisarcidae: Halisarca: Halisarca dujardini (Johnston, 1842)

What is a sponge exactly? You probably thought it’s something you use for cleaning. These simple animals are without circulatory, digestive and nervous systems and have been around for over 500 million years! Continue reading “38/150: Soak up this info on sponges!” →