Many deep-sea cephalopods use bioluminescence for counterillumination, helping them match faint downwelling light and avoid predators.
10pts
All bioluminescent cephalopods produce their own light entirely through genes in their bodies, without any microbial help.
10pts
The photophores of many deep-sea cephalopods can be used for species recognition, mate attraction, and signaling in addition to camouflage.
10pts
Bioluminescence in deep-sea cephalopods is generally powered by sunlight absorbed at the ocean surface during the day.
10pts
The vampire squid is a deep-sea cephalopod known for using light-producing organs and a cloak-like web, even though it is not a true squid.
10pts
Deep-sea cephalopods with bioluminescence are found only in the hadal zone below 6000 meters.
10pts
Some deep-sea cephalopods can alter the intensity or pattern of their light emissions to create more complex signals.
10pts
Bioluminescent displays in deep-sea cephalopods can sometimes startle predators by producing a sudden flash or glowing plume.
10pts