“…in Balistes capriscus (Vincent, 1963), or occur during grating of pharyngeal teeth in B. capriscus, Balistes vetula and Odonus niger (Norman, 1931;Fish, 1948;Fish et al, 1952;Moulton, 1958). Because these sounds are mainly heard while crushing mollusks and hard corals (Fish, 1948(Fish, , 1954Tavolga, 1965;Tricas and Boyle, 2014), it is unclear whether they are used for communication. In some triggerfishes (O. niger, B. capriscus), sounds could also result from movement of the spine of the first dorsal fin, which can be locked into an erect position (Fish et al, 1952;Schneider, 1961).…”