Assertion: cuttlefish's squid | /r/CapableOf | generate light
Facets:
value: to match the downwelling light
type: PURPOSE
Source sentences:
text: Some mesopelagic squid such as the firefly squid (Watasenia scintillans) and the midwater squid (Abralia veranyi) use counter-illumination camouflage, generating light to match the downwelling light from the ocean surface.