Assertion: echinoderm's mouth | /r/AtLocation | the underside
Facets:
value: in many
type: OTHER
Source sentences:
text: The mouth and anus are both located on the upper side of the theca, making the dorsal (upper) surface the oral surface, unlike in the other echinoderm groups such as the sea urchins, starfish and brittle stars where the mouth is on the underside.
text: In many, the mouth is on the underside and the anus on the top surface of the animal.
text: The mouth is on the underside and the anus is on top.