An introduction to sea stars, including one that’s a metre wide!
- Sea stars are a type of echinoderm.
- All adult echinoderms have radial symmetry, which means their body parts are arranged around a central axis.
- Sea stars feed by pushing their stomachs out through their mouths.
- With a diameter of up to 1 metre, the sunflower sea star is the largest species of sea star in the world.
Though they look quite different from one another, all sea stars belong to the same phylum: the echinoderms.
All adult echinoderms have radial symmetry.
This means that their body parts are arranged around a central axis – like the spokes of a wheel.
Body parts radiate from centre
Most echinoderms tend ...
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