As you may or may not already know, most octopus have ink sacs. These sacs are a very important variable for the octopus as they use the ink to work as a defense mechanism when under attack. The ink acts as a distraction/eye and smell irritant againt the predator, putting them in a stINKY situation. So, what does this magical life-saving ink have in it? Simply put, this ink is composed of highly concentrated melanin, the same pigment humans have which conducts our beautiful skin and hair color. Like most Cephalopods, a subgroup of marine invertebrates in which the Octopus family belongs to, this concentrated melanin is a natural dye that octopuses manufacture in the ink sac. So does this ink have any thing in common with the ink we use in school? Nope. This is because today's pen ink is made up of synthetic dyes and compounds, all of which are practically man made. How nutty is that?!
King, Nancy. "Is Octopus Ink Similar to Fountain Pen Ink?" The Octopus News Magazine Online. Deep Intuition, LLC, 28 Dec. 2013. Web. 20 June 2017.
Strauss, Bob. "10 Fun Octopus Facts." ThoughtCo. ThoughtCo, 28 Apr. 2017. Web. 20 June 2017.
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