It was famous because, once a year, thousands of one-celled plants bloomed at once, so that the sea became green-tinted. South of the Algae Sward were the Seascape Mountains, a range of underwater peaks and home of whaladons.
During the Battle of Calamari, World Devastator Nullifier-5 became inoperative just over the Sward. It was then submerged under twenty meters of water, with inactive repulsors. The Calamarian Council considered it too expensive to salvage, so it was only stripped of its control system. Upon the following years, it became a home for some of the native sea life, including krakanas, sussimis and nano-stars. Some sport drivers have also started mapping its interior.
At some stage, the Nullifier-5 began leaking toxins at such a rhythm that soon the Algae Sward would be poisoned. The Council called a team of specialists to seal the leaky tanks to avoid that.