There are 15 major harvesting areas for squids worldwide, but only two have sustainable harvests today. Common predators of octopuses and squids are moray eels, fishes, seals, whales, sea stars and several species of birds. They can change colour and create countless intricate patterns on their bodies to blend with their surroundings. Octopuses and squids can expel a dark cloud of ink from an ink sack. This confuses predators and gives the octopuses and squids time to escape.
Some squids produce light.
In dark waters, this diverts attention by disguising their contours. Some octopuses and squids can release poisons to paralyze predators. Octopuses are extremely sensitive to touch, but cannot discriminate between heavy and light objects. Octopuses have taste receptors all over their bodies and are as much as 10 to 1000 times more sensitive to taste than humans. Octopuses and squids have excellent vision, but may be colour-blind.