Assertion: marine gastropod | /r/HasAspect | tube
Facets:
Source sentences:
text: Some marine gastropods, especially those that live on a muddy sea floor, have a tube (siphon) protruding from the front of the shell through which clean water is drawn into the mantle cavity.
text: Many marine gastropods are burrowers and have siphons or tubes that extend from the mantle and sometimes the shell.
text: Many marine gastropods are burrowers and have siphons or tubes that extend from the mantle and sometimes the shell.