Assertion: jellyfish's mouth | /r/AtLocation | lower surface
Facets:
Source sentences:
text: the lower surface is called the subumbrella; the mouth is located on the lower surface, which may be partially closed by a membrane extending inward from the margin (called the velum).
text: the lower surface is called the subumbrella; the mouth is located on the lower surface, which may be partially closed by a membrane extending inward from the margin (called the velum).