👉 Aplacophora is a phylum of marine invertebrates that includes various types of jellyfish, guppies, and other aquatic animals. It is also known as "sea jelly" or "water jelly." These animals are characterized by their long, flexible tentacles and have no true shells but instead use their bodies to trap food and remove parasites from the water. They are fascinating creatures that can be found in various parts of the world, including oceans, lakes, rivers, and even on