I had been wanting to film Eunice aphroditois, a Bobbit worm, for years ... only aware that there was a giant carnivorous worm close by in the blackness, and quite possibly more of them around ...

David Attenborough introduced us all to a nightmarish creature known as the bobbit, a metre-long worm with jaws as sharp as daggers – and we're not likely to forget about it any time soon.