sixgill en · ADJ
Etymology
From six + gill.
Meanings
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(not-comparable) Having six pairs of gill slits, as some sharks do.
“Shark After Dark” features scientists swimming with their subjects as they investigate their nocturnal feeding habits; residents of the Seattle area will be interested to know that well inside Puget Sound, quite large sixgill sharks come to the surface for dinner within 150 feet of shore.
2009 August 1, Mike Hale, “Ah, That Jersey Shore: The Fish Are Really Biting”, in New York Times:
Deriveds
Atlantic sixgill shark · bluntnose sixgill shark · bigeyed sixgill shark