The body of these creatures is made up of a substance called Mesohyl, which has holes called ostia.
In 1995, the first carnivorous members of this phylum were discovered, an adaptation to life in resource-poor areas like Antarctica. Collagen in these animals is produced by cells called Lophocytes, which are amoeba-shaped and move freely though these creatures's bodies. The largest and most complex creatures in this phylum adopt the Leuconoid body shape, while simpler creatures adopt the Syconoid or Asconoid shape. This phylum's (*) sclerocyte cells produce the spicules that give these creatures structure. The body of these creatures is made up of a substance called Mesohyl, which has holes called ostia. These animals have special flagellated "collar cells" called Choanocytes that create a flow of water through these creatures, which are shaped as simple tubes. For ten points, name this simplest animal phylum, home to sponges.
In 1995, the first carnivorous members of this phylum were discovered, an adaptation to life in resource-poor areas like Antarctica.
{Porifera} [prompt on {“sponges”}]