Answer: blowholes

AnswerCrossword Clue
BLOWHOLESThey may spout off
blowholesThe nostril of a whale on the top of its head
blowholesBLOWHOLE, an air or gas vent
blowholesA cavity in a metal casting, produced by the escape of air through the liquid metal
blowholesA hole for blowing or breathing through, in particular
blowholesA vent for air or smoke in a tunnel or other structure
blowholesA hole in ice to which seals, whales, and other aquatic animals come to breathe