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tube feet
Sea Stars can grow back legs or arms if one gets cut off.
sea lilies and feather stars
sea lilies and feather stars
The scientific name of brittle stars is Ophiuroidea. They are echinoderms closely related to sea stars, but have long, flexible arms that they use for movement and feeding.
Starfishes, or sea stars, are members of the do-all-starfishes-or-sea-stars-have-five-armsAsteroidea. Their bodies consist of a central disk from which radiate from five to more than twenty arms or rays
Sea urchins, sand dollars, and sea stars are classified in the phylum Echinodermata. They have a spiny exterior and tube feet that they use for movement and feeding.
The size of a starfish or sea star can vary. There are over 2,000 different species of sea stars that have 5, 10, 20, 40 or more arms.
Includes: Sea Stars, Sea Lillies, Sea Urchins, Sea Cucumbers, Brittle Stars
sea stars have NO brains
An adult feather star is not sessile. It eventually develops arms and is able to move around. Sea lilies are sessile.
well, they basicly grow back like human arms. it's the same format.