“…Therefore, a fundamental requirement for a successful PAM of deep‐sea fish is a type of deployment which minimizes self‐noise (Rountree et al., 2020; Rountree & Juanes, 2010; Wall et al., 2014). This is the case of static acoustic monitoring (SAM; Bolgan et al., 2020; Carriço et al., 2019; Carriço et al, in press; Cato, 1978; McCauley & Cato, 2016; Wall et al., 2013) and of gliders (Bolgan et al., 2020; Wall et al., 2013, 2017). SAM is static and silent devices (i.e., hydrophone arrays deployed on the sea bottom) already used to record deep‐sea fish sounds, for example in the Bahamas (Mann & Jarvis, 2004), in the West Florida Shelf (USA; Wall et al., 2013), in the Perth canyon (AUS) (McCauley & Cato, 2016) and in Azores seamounts (Carriço et al., 2019; Carriço et al, in press).…”