Assertion: starfish's mouth | /r/AtLocation | the underside
Facets:
Source sentences:
text: The mouth is on the underside and the anus is on top.
text: Your starfish's mouth is on his underside, and you may need to place his food directly below him so he can get it easily.
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.