Sepia ink consists partly of mucus and otherwise mainly of melanin, this is a dye. But not only the sepia sprays it with this dye, the octopus and the Squid can do this too. The ink is obtained by removing the ink bags from the Squid. The ink bag is a silver-colored blister located in the center of the Squid. The Squid uses the ink in an emergency, because it sprays ink, a smoke screen is created.