Finding Nemo had the opposite effect that was intended. Despite its negative…

Finding Nemo had the opposite effect that was intended. Despite its negative portrayal of keeping fish in aquariums, the use of clownfish prompted the demand for aquariums to triple. Demand was met by large-scale harvesting of tropical fish from the wild which devastated Clownfish Populations.

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What you’re seeing is the defense mechanism of a tiny crustacean…

ostracod

What you’re seeing is the defense mechanism of a tiny crustacean called an ostracod, a shrimp-like organism about 1mm in size that some fish accidentally eat while hunting for plankton. When eaten by a translucent cardinalfish, the ostracod immediately releases a bioluminescent chemical in an attempt to illuminate the fish from the inside, making it immediately identifiable to predators. Not wanting to be eaten, the cardinalfish immediately spits out the ostracod, resulting in little underwater fish fireworks.

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