A sea slug that is able to detach, re-grow and then re-use its penis has surprised scientists.
Japanese researchers observed the bizarre mating behaviour in a species called Chromodoris reticulata, which is found in the Pacific Ocean.
They believe this is the first creature known that can repeatedly copulate with what they describe as a “disposable penis”.
The study is published in the Royal Society’s journal Biology Letters. (via BBC News - Sea slug’s ‘disposable penis’ surprises)