sepi

Sepi, also known as cuttlefish ink, is a dark pigment secreted by cuttlefish and some squid. This ink sac is used by cephalopods as a defense mechanism to evade predators. When threatened, the animal releases a cloud of ink into the water, obscuring the predator's vision and allowing the cephalopod to escape. The ink is composed of melanin, a pigment also found in human skin and hair, along with other compounds like mucus and a neurotransmitter called acetylcholine.

Historically, sepi has been used in various ways. In art, it was employed as a pigment for inks and paints, valued for its rich, dark hue. The term "sepia" in photography and art refers to a reddish-brown tone, which is derived from the ink of the common cuttlefish (Sepia officinalis). In culinary applications, sepi is used to color and flavor dishes, particularly in Mediterranean and Asian cuisines. It imparts a distinctive briny taste and a deep black color to pasta, rice, and seafood dishes. The ink is typically collected from fresh cuttlefish and processed for consumption. Its nutritional profile includes protein, iron, and vitamin E. While the primary function of sepi is defense for the cephalopod, its unique properties have led to its utilization by humans for both artistic and gastronomic purposes.