David Bellwood, a marine biologist and an internationally recognized expert in coral reef fishes and systems, combines skills in such disparate fields as ecology, palaeontology, biomechanics and molecular systems to understand the nature of reefs. “The argument would be that if you’ve got a reef with a thousand species, it is a lot more resilient, and a lot more capable of maintaining itself than a reef with a hundred species. I don’t think that is true.”