👉 Echinus is a genus of small, flat-bodied marine invertebrates that includes some of the most fascinating and diverse groups of sea creatures. Some common characteristics include their large size, streamlined bodies, and ability to change color through camouflage. Echinus are known for their unique adaptations such as the ability to change color from white to black or from black to yellow, which can be used in various ways, including camouflage in water.
Echinus