What do colours signify for ocean-dwelling creatures?

If you live the life of a fish, one of your primary methods of communicating to others is through your colouration. Different colours mean different things, and more often than not the message is “I am poisonous, so stay away”. Take the young nudibranch featured in the video above, for instance: its bright colours let predators know that it is quite toxic, and hungry fish looking for a snack should think twice before chowing down on this sea slug.

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Meet the man they call the “Elephant Whisperer” of the Pittsburgh Zoo. Although caring for these mammoth animals is dangerous work, his unique skills are needed during this crucial time, as two of the elephants under his care are on the verge of giving birth.

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