Here is a video which is worth watching several times and musing over. (Thanks to Hassan for recommending it.)

It starts beautifully:

“Attracting attention is an essential part of winning a mate. The world’s oceans are filled with brilliant colours, all designed to make their wearers conspicuous. Unfortunately this small Japanese puffer fish is dull…”

And it goes on even more beautifully:

The video has subtitles but if there is anything you don’t understand, feel welcome to ask.

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