ML112921

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NOTES: NML studies, LML, Nov. 1952. Well-acclimated captives (ca. 25) in outdoor pen: typical crunches and scraping noise with thumps during competitive feeding. Individuals in test tank: thumps, grunts, knocks, sometimes accompanied by loud scrapes on MS and ES. Sometimes loud scrape and several clicks as trigger raised. Fish, M.P. and W.H. Mowbray. 1970. Sounds of the Western North Atlantic fishes: a reference file of biological underwater sounds. Johns Hopkins Press. Baltimore. p. 173. Tape notes: 2. Ocean Tally. Canthidermis sobaco. Fedding, Dur. & ES. Bim. 23 (8-9.75) 39A (0-10).