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Choice: 1a
Radially symmetrical body with 5-14 arms (damaged species may have less arms)
Choice: 1b
Body elongate with 10-20 oral tentacles.


Holothuroidea
Choice: 1c
Body globular or flat, usually covered in spines, without oral tentacles.

Echinoidea
Choices made: 0
Remaining: 61
Excluded: 0
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