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?
Where is the madreporite located?
Do they have pedicellariae?
Do they have dermal branchiae?
Where are they found?
What habitats are they found in?
low tide zone
What phylum and class?
What is it called?
called the brittle stars