"What characteristics are seen in this class?", "attached to the substrate with many branched arms" "What is the unique characteristic that is seen in this class?", "substrate feeders" "Is the ambulacral groove open or closed?", "open" "Where is the madreporite located?", "no madreporite" "Do they have pedicellariae?", "no" "Do they have dermal branchiae?", "no" "How do these organism feed?", "produce mucus on their tube feet to capture food" "Where are they found?", "oceans" "What type of habitat are they found in?", "Sea floor"
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