The Australian snubfin dolphin (Orcaella heinsohni) is endemic to Australian waters, yet little is known about its abundance and habitat use. To investigate the feasibility of Passive Acoustic Monitoring for snubfin dolphins, biosonar clicks were recorded in Cygnet Bay, Australia, using a four-element hydrophone array. Clicks had a mean source level of 200 +/- 5 dB re 1 mu Pa pp, transmission directivity index of 24 dB, mean centroid frequency of 98 +/- 9 kHz, and a root-mean-square bandwidth of 3163 kHz. Such properties lend themselves to passive acoustic monitoring, but are comparable to similarly-sized delphinids, thus requiring additional cues to discriminate between snubfins and sympatric species. (C) 2018 Acoustical Society of America.
