Assertion: box jellyfish | /r/HasAspect | advanced nervous system
Facets:
Source sentences:
text: Like true jellyfish, it belongs to the phylum Cnidaria, but a box jellyfish has a cube-shaped bell, four sets of tentacles, and a more advanced nervous system.
text: Box jellyfish also have a more advanced nervous system then their cousins, allowing them to quickly avoid, and engage, objects.