👉 Merisoids are spherical, thick, and soft-bodied animals that belong to the family Megalobranchiiformes (paleomammals). They are characterized by their large, rounded bodies with a thin shell-like structure. These animals have a single or multiple rows of cells arranged in a row, called an organ, which is surrounded by a protective capsule known as a mesenchyme or meris. Merisoids are commonly found in aquatic environments and can be found in both
