Throughout history, ocean piracy was common in different parts of the world, but it was rare in the Horn of Africa waters. Although international law clearly defines piracy, the term is often carelessly used interchangeably with different crimes (armed robbery, atrocities against the victims of shipwrecks, maritime terrorism, insurgent attacks, on sea intercommunal conflicts, and at times illegal fishing). In the first section, this article critically examines the link between the multiple definitions of the concept of piracy and how these can explain the various incidents that occurred historically on the coast of Somalia. In the second part, we explain different types of maritime attacks and criminalities that took place in the Horn of Af...