Butt's a shill. Melanin is the answer he studiously pretends not to know. Squid ink is melanin concentrated, Melanin is not particularly prone to decay at all.
One cool result of the ink is that it potentially opens the way to better treat skin cancers because it's allowed the very slight rate of decay in one type of melanin to be measured.
"Because melanin survives so long, an analysis of the melanin from old cancerous tissue samples could give researchers a useful tool for predicting the spread of melanoma skin cancer in humans."
http://phys.org/news/2013-06-melanin-jurassic-era-mollusk-tool-cancer.html
Crazy what can happen when science goes on.