Answers to “Test your knowledge of sea stars”

Answers to “Test your knowledge of sea stars” from December 31, 2009.

True or False: Sea stars are fish. They are echinoderms, a group of invertebrates. Invertebrates have no backbones. All fish have backbones.
True or False: Sea stars are closely related to sea cucumbers, sea urchins and brittle stars.
True or False: Sea stars have a flexible skeleton.
True or False: Sea stars breathe through gills. They breathe through a water vascular system. You can see the tube feet (a main component of the water vascular system) on the underside of the sea stars.
True or False: Sea stars can regenerate most body parts.

Congrats to all those that got them correct!

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