Conch Is a Marine Mollusk With a Large __ Shell

This page is the CodyCross answer for the clue below from Under the sea, Group 31, Puzzle 2.

Question is: Conch Is a Marine Mollusk With a Large __ Shell

and the answer is: SPIRAL

Word Meaning:

SPIRAL — (geometry) A curve that is the locus of a point that rotates about a fixed point while continuously increasing its distance from that point.

Definitions from Wiktionary.