Here's a thought provoking article about the significance of a recent accidental catching of a colossal squid by commercial fishing. http://news.bbc.co.uk/2/hi/science/nature/6549161.stm Courtesy of the BBC.
The most surprising part of the article for me was the mention of how some fish that are being caught for food are over 150 years old.
Here's some more info about those very old fish being over-fished.