Looking just at sound pressure data can be inappropriate, because
both the tested species are probably primarily sensitive to the particle
motion of sound, namely to particle acceleration. In fact, gobies are
commonly considered to be hearing generalists (Lugli et al., 2003), i.e.
they detect sound solely via their inner ears, and no other peripheral
morphological structures are involved in the hearing process.
Similarly, no swim bladder diverticula or other peripheral adaptations
have been described so far in Pomacentrids. Nevertheless, it is often
unknown which sound component (particle motion or sound
pressure) is more relevant to most of the species for detecting
sound at the hearing threshold (Horodysky et al., 2008). For example,
hearing in Stegastes (syn. Eupomacentrus) dorsopunicans (Pomacentridae)
resulted to be governed by particle motion around 100 Hz, but
it was dominated by pressure detection at frequencies of 300 Hz