Question

Gastrovascular cavity with one opening is found in porifera

Answer 1

It is found in Cnidaria

Answer 2

gastrovascular cavity is the primary organ of digestion and circulation in two major animal phyla: the Cnidaria (including jellyfish and corals) and Platyhelminthes (flatworms). The cavity may be extensively branched into a system of canals. In cnidarians, the gastrovascular system is also known as the coelenteron