Assertion: octopus's ring | /r/MadeOf | multi-layer light reflectors
Facets:
Source sentences:
text: In the greater blue-ringed octopus (Hapalochlaena lunulata), the rings contain multi-layer light reflectors called iridophores.
text: In the Greater Blue-ringed Octopus, the rings contain multi-layer light reflectors which are arranged to reflect blue-green light in a wide viewing direction.