The Fossil Battleships are recurring bosses in the Darius series, appearing in all games. These battleships are the main attackers in the Belser army, always commanding Belser's forces in the front lines. Being based on the original Thiima battleships, they were upgraded with a plate armoring, which makes the impervious to enemy fire, thus their only weak spot is the mouth, which is where it's guns are stored. They are based on the coelacanth, which is what earned them the "Fossil" moniker.