Phylum: Echinodermata , Class: Ophiuroidea (BRITTLE STARS)

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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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