First there was Caitlyn Jenner and now the Australian Central Bearded Dragon: sex changers have been all over the news in recent weeks.

In the case of the latter, scientists have just discovered that the cold-blooded reptile has chromosomes that can change depending on the weather. This means, to put it in simple terms, the temperature at which the bearded dragon’s eggs are incubated at will dictate whether you have a boy or a girl.

All Australian Central Bearded Dragon begin life with two Z chromosomes – making them genetically male – but at warm temperatures this genetic make-up changes and they are born female. It had been seen in the lab before, but for the first time ever it has taken place in the wild.

Exciting, head-scratchingly interesting news, yes. But scientists also say that the discovery raises some concerns. Namely, with global warming pushing temperatures higher and higher, it is foreseeable that more of the lizards could make the transition to become female.

However, while this has been making the news, gendering altering animals are nothing new; there have been various extraordinary discoveries of species that are able to switch between being male and female to adapt to their surroundings.

Hawkfish, Parrotfish and Clown anemonefish all have the ability to choose their gender depending on the balance of males and females in the area. Sluts.

But none of these can compete with our favourite sex-changing animals. No, no. That prize goes to the cleaner fish.

Back in 2011 a team from the Institute of Zoology at the Zoological Society London published a groundbreaking study which found that female cleaner fish, if they eat too much can actually turn into men. What better motivation than to not eat that last tub of ice cream than the risk of a penis popping out?!