Assertion: jellyfish's medusa | /r/HasProperty | captured in the plankton
Facets:
value: curiously
type: MANNER
value: rarely
type: DEGREE
Source sentences:
text: Curiously, although a healthy captive Velella will release many medusae under the microscope, and are expected to do the same in the sea, the medusae of Velella are rarely captured in the plankton and very little is known about their natural history.