👉 Entozoans are a group of marine animals that belong to the phylum Animalia, which includes many different types of fish, crustaceans, and bony fish. These animals have a wide range of characteristics, including their ability to change color and shape, and their ability to live in both fresh and saltwater environments. They also have unique adaptations for survival in aquatic environments, such as the ability to swim faster than land animals or to use gills to extract oxygen from water.