Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. Pearlfish don't have scales ...

Pearlfish are slender eel-like fish that survive by swimming directly into the bodies of sea cucumbers through their anus, using the animals as living shelters from predators . Sea cucumbers breathe ...

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This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American A new study has revealed how marine pearlfish ...