Assertion: cuttlefish's cephalopod | /r/HasAspect | an ink sac
Facets:
Source sentences:
text: With the exception of the Nautilidae and the species of octopus of the suborder Cirrina, all known cephalopods have an ink sac, which can be used to push out a cloud of dark ink to confuse predators.
text: Almost all cephalopods have an ink sac, a bladder that can suddenly release a plume of dense, black ink.