In the deep of the ocean, where the sun’s rays struggle to penetrate, organisms lurk that could solve the biggest medical crisis facing humanity.

Far below the surface bacteria are engaged in warfare with each other — and to do so they make an antibiotic so strong it can destroy the toughest superbugs in our hospitals.

“But there’s a problem,” Rebecca Goss, a professor of organic chemistry at the University of St Andrews, said. “It disintegrates in sunlight.”