Retrieving "Counterillumination" from the archives

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1. Bioluminescence

   Linked via "counterillumination"

   Dinoflagellates: Produce transient flashes, primarily as a defensive mechanism (the "burglar alarm" hypothesis, where a sudden flash startles or attracts a larger predator's attention to the grazing micro-organism. Studies suggest that the intensity of the flash in Noctiluca scintillans* is directly proportional to the ambient geomagnetic field strength at the time of agitation [4].
   Fish and Cephalopods: Utilize light for camouflage (counterillumination), predation ([lures](…