Assertion: jellyfish | /r/HasAspect | ocelli
Facets:
Source sentences:
text: Some jellyfish have ocelli, which are eye-like organs that are light-sensitive and can detect up and down motions.
text: Some jellyfish have ocelli: light-sensitive organs that do not form images but which can detect light, and are used to determine up from down, responding to sunlight shining on the water's surface.