KnowraSpiracleLinked fromLinked fromThe 29 pages that link to Spiracle, each with the reason it gives.All 29Broader topic 3Related 24Compared with 2OperculumCompared with: Sharks use spiracles for water intake rather than a bony opercular cover.ChimaeraCompared with: Chimaeras’ gill openings are covered by a flap, unlike the separate exposed openings typical of sharks.