Study of fossilised beaks shows patterns of wear and suggests some ancient species were up to 19 metres long Study of fossilised beaks shows patterns of wear and suggests some ancient species were up to 19 metres long Giant “kraken-like” octopuses that used powerful beaks to crunch through bones of prey were among the most formidable predators of the Cretaceous oceans, according to research. Analysis of dozens of newly identified fossils reveals that some ancient octopus species reached up to