In the beginning of Baldur’s Gate 3, there is a big scene with a Nautiloid, but these ships have been around for a long time in the D&D world.
Dungeons & Dragons stories feature a wide range of creatures and worlds, from small towns in the green countryside to huge cities that sparkle with dark magic. A Nautiloid is one way to get around these worlds, including the strange fields.
It looks like a seafaring ship at first, something like a long speedboat or a yacht, but the presence of tentacles and a massive conch shell shows a vessel of the Nautiloid class. One of these ships was the focus of the first cut scenes in Baldur’s Gate 3. It was a technological marvel, but most explorers probably wouldn’t want to visit it. But the Illithids, who are also called Mind Flayers, did not use every Nautiloid. In the D&D world, this cool technology is used by a number of different races.