All the better to see whales with

摘要

The giant eyes of the worlds largest squid seem to be specially adapted to spot approaching predatory sperm whales. Dan-Eric Nilsson at Lund University in Sweden and his colleagues examined a photograph of an adult giant squid (Architeuthis sp.) and a full-size colossal squid (Mesonychoteuthis hamiltoni) specimen, and found both animals' eyes to measure about 27 centimetres in diameter -the largest eyes of any species. The researchers created a mathematical model relating eye size to vision.