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It's not often you'll get to see a big picture of a slippery dick on a family news site.

But that's exactly what the graphic image above shows - and we're sorry if anyone is offended.

The slippery dick wrasse is just one of many x-rated animals which have been named on shamed on Twitter during a campaign dubbed #StupidCommonNames.

Biologists launched the hashtag to raise awareness of some of the most ridiculous monikers in the animal kingdom.

The rundown of badly-named beasties includes moths called "grateful midgets" and others called "intractable quakers", as well as a "Mexican jumping viper" which can't actually jump.

Mirror Tech's favourite is the afore-mentioned pornographic poisson, if you'll pardon our French.

The dick reaches a maximum length of 35cm and is found swimming in the tropical waters of the western Atlantic Ocean.

Other weirdly-named animals include a bird which has apparently forsworn a certain suggestive-looking fruit and a cute beastie which is nowhere near as dangerous as it sounds.

We also learned a bird called the brown creeper is "very respectful of personal boundaries" and have been informed that the woodchuck does not actually chuck wood, despite rumours to the contrary.

Here are a few of the other tweets which used the hashtag.