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RESOURCES
The NOAA website briefly explains bioluminescence. It notes that bioluminescence is not rare and that most types of animals in the ocean have bioluminescence.
This USOceanGov video explains bioluminescence. It discusses why certain animals use bioluminescence – either to attract mates or evade predators.
The American Fisheries Society website defines what a photophore is, what they do, and where they are located on different fish. The website also has bioluminescence listed underneath and explains how photophores are used in bioluminescence.
This video talks about the two chemicals—luciferin and luciferase—that cause the glowing (bioluminescence) in animals. The video points out that bioluminescence is pretty common in animals. It talks about what a photophore is and what it is used for—communication, warning, etc.
The AquaticFieldCourse2013 website discusses many types of migration in the water column in response to different stimuli. The website focuses mainly on vertical migration and discusses a study that was performed to see if zooplankton distribution along the water column was different between day and night.
This SAMSmarinescience video features a group of scientists that have traveled to see the zooplankton migration. The migration is described and an explanation is offered as to why the zooplankton migrate. The scientists used 20 years worth of data and discovered that zooplankton respond to moonlight.
This ThoughtCo. website explains what countershading looks like on animals. It also talks about how countershading is beneficial to aquatic animals.
This BlueWorldTV video uses sharks to explain countershading. The video explains that this is what sharks do to hide in plain sight.