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Animal discovered to have ‘on-demand anus’ that disappears when not in use

One of the most ancient types of creature on our planet may now become the butt of an evolutionary joke after it was discovered that the jelly has an ‘intermittent anus’ which appears and disappears on command.

The warty comb jelly, also known as a sea walnut, has no permanent connection between its gut and the rear of its body. Both its gut and its epidermis are just a single cell thick.

Instead, the jelly builds up waste in a bubble near its outer skin before a temporary anus opens up and expels the waste…[ ]

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