ECHINODERMS

Class which contains Basket Stars and Brittle Stars

• Ophiuroidea
• Holothuroidea
• Asteroidea
• Echinoidea

Class which contains Sea Biscuits, Sand Dollars, and Sea Urchins

• Ophiuroidea
• Echinoidea
• Holothuroidea
• Asteroidea

Class which contains Sea Cucumbers

• Holothuroidea
• Echinoidea
• Ophiuroidea

Class which contains Sea Lilies and Feather Stars

• Echinoidea
• Holothuroidea
• Crinoidea
• Ophiuroidea

Class which contains Sea Stars

• Asteroidea
• Crinoidea
• Holothuroidea
• Echinoidea

Phylum which contains Sea Stars

• Holothuroidea
• Asteroidea
• Crinoidea
• Echinodermata

Proposed as a 6th class to contain two species of sea daisies

• Concentricycloidea
• Echinodermata
• Asteroidea
• Crinoidea

A large, multiple-armed starfish that usually preys upon hard, or stony, coral polyps stony, coral polyps

• Brittle star
• Crown-of-thorns
• Echinodermata
• Asteroidea

A secretive, hard-skinned, long-armed animal that lives on therocky sea floor; the arms do not touch each other at their bases

• Brittle star
• Crown-of-thorns
• Concentricycloidea
• Echinodermata

A spiny, globular animal that lives on the rocky seafloor

• Sand dollar
• Brittle star
• Crown-of-thorns
• Sea urchin