Starfish, also known as sea stars, vary greatly in size depending on the species. On average, they typically range from about 5 to 10 inches (13 to 25 cm) in diameter. However, some species can be much larger. For example, the sunflower starfish can grow to be over 3 feet (90 cm) wide!
The size of a starfish is influenced by various factors, including its habitat and genetic traits. In general, smaller species tend to live in shallower waters, while the larger ones are often found in deeper regions of the ocean. Understanding the size range of starfish helps us appreciate their diversity and the different ecosystems they inhabit.