science environmentScientists Study ‘Singing Fish’ For Ways To Improve Human HearingBy Cassandra Profita (OPB)Vancouver, Wash. July 8, 2018 3:45 p.m.📨 Daily news in your inboxSign up today for OPB’s “First Look” – your daily guide to the most important news and culture stories from around the Northwest.EmailPlease leave this field blankSign up