Squids are known to use their ink defensively in two different ways: first, they may use it as a decoy to attract their predators, or second, they may use it as a “smokescreen” and hide behind it. Fig. 2: Squid can release a cloud of ink to help escape a predator (Photo: Colin Marshall). More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.