Starfish ‘arms’ are actually extensions of their head, scientists say
The echinoderms more closely resemble disembodied heads than multi-limbed creatures, experts have discovered
Starfish may appear to have a plethora of limbs, but it turns out the creatures actually resemble something akin to a disembodied head.
Experts say it has long been a conundrum how starfish, sea urchins and other animals with a fivefold body plan, known as echinoderms, evolved from an ancestor with twofold symmetry – a body plan common today in animals including insects, molluscs and vertebrates.
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