What and how do they eat?
Giant squids are active predators that can instantaneously extend their tentacles to strike at prey. They arms move prey into the mouth. Squids bite into food with their sharp beak and then grind it with the radula (ribbon of teeth). The food must be small beause the esophagus goes through the brain on the way to the stomach.
Giant squids eat other squids and probably deep-sea fishes such as hoki (Macuronus novaezelandiae) and orange roughy (Hoplostethus atlanticus), as in the model on exhibit.
What eats giant squids?
Giant squids are so large that they have few predators. Scientists know sperm whales (Physeter macrocephalus) eat them because giant squids’ beaks have been found in the stomachs of sperm whales.
Cephalopods avoid being eaten by making a quick escape into the darkness of the deep ocean using jet propulsion. Often they leave behind a cloud of ink that confuses the predator. Cephalopod ink is mucus mixed with melanin (a dark pigment). In some squid species, the ink looks like chocolate syrup.