Nautilus

Nautili were squid-like creatures with large shells. They were thought to typically believed to be deep sea dwellers, though they foraged for food in the shallower waters of the Sea of Moving Ice.

Subspecies
Frost giants of the Sea of Moving Ice sometimes carved runes into the shells of nautili, creating what were known as runechanged nautiloids, which produced magically conductive ink.

Giant nautili appeared in the Elemental Plane of Water, as well as upper planar oceans such as Lunia, Thalasia, and Ossa. Some giant nautili even swam in the depths of a few oceans of the Prime Material plane.

Uses
Nautilus shells were valued by collectors, with prime specimens netting 5 gp. Tritons sometimes used nautilus shells to channel arcane magic, in lieu of i.e. wands. The Temple of Ten Thousand Gods used a nautilus shell as its symbol.

Trivia
Some sea elves were known to craft and wear jewelry that was shaped like nautili.

Appearances

 * Adventures
 * Dungeon #113, "Practical Magic"
 * Video games