A male giant squid uses its muscular elongated penis - up to 1.5m long - to "inject" sperm packages under pressure directly into the arms of females. Dr O'Shea has found males implanted with their own spermatophores.
"If we are talking about a 200kg squid, this is an animal with a 20g brain," he told New Scientist. "It's not very bright and it is trying to co-ordinate a metre-long penis. He's going to get a bit confused."