Sepia ink consists of some mucus and for the rest it is mainly melanin, this is a dye. But not only does the sepia spray 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 bladder located in the center of the squid. The squid uses the ink in case of emergency, as it sprays ink, a smoke screen is created.