What characteristics do they?
they have 5 thin arms radiating from a central disc
What unique characteristic do they have?
breaking arms when they are disturbed
Is the ambulacral groove open or closed?
closed
Where is the madreporite located?
oral side
Do they have pedicellariae?
no
Do they have dermal branchiae?
no
Where are they found?
worldwide
What habitats are they found in?
low tide zone
What phylum and class?
What is it called?
phylum: Echinodermata
class: Ophiuroidea
called the brittle stars
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