NEET BIOLOGY

Detailed explanation-1: -Starfish typically have five arms, or rays, but there are species with as few as three or as many as fifty. Arms occur in a variety of sizes and shapes, depending on the species.

Detailed explanation-2: -We typically think of a starfish as having five arms, but actually starfish anatomy is a bit more varied than that. Across the circa 1, 900 species of starfish found around the world, the majority do have five arms but some species have six or seven, and some have between 10 and 15.

Detailed explanation-3: -"Those species of starfish with more than five arms are also descended from five-armed ancestors.” There are a number of possible explanations for how the body form of adult starfish came about.