Physiological adaptations

The Giant Squids the unknown phantom of the sea.  It's a very elusive animal that has been scarcely seen throughout history.  Recently, new dissections and computer models have offered a lead in the mystery as to why the squid's eyeballs are soccer ball-sized and are three times wider than any other animals.  Scientists believe that the squid's eyeballs size is a evolutionary trait that stemmed from their need to avoid capture by the Sperm Whale.  The Sperm Whale is the Giant Squid's greatest predator.  It's believed that the eyes evolved to see bioluminescent trails of light left by sperm whales. Additionally, the colossal squid would be able to recognize a sperm whale from 120 meters away.

The study of a squid's physiology can offer insight into other adaptive sight measures taken by other animals.  Maybe our eyes evolved to help us protect against predators.  It's also interesting to note that the energy need to run the neurons for their eyes was a significant amount.  More research will have to be done in order to fully understand the physiological structures of the giant squid.