Dear MARMAM colleagues, I am glad to share with you our recent publication describing the clicking behavior of franciscana dolphin with acoustical parameters and temporal patterns of different types of sound emissions. Bittencourt L, Carvalho RR, Pereira K, Santos-Neto EB, Lailson-Brito Jr. J, Bisi TL and Azevedo AF (2025) Acoustic parameter variation and emission patterns in franciscana dolphin (*Pontoporia blainvillei*) clicking behavior at high frequency. *Front. Mar. Sci.* 12:1641888. doi: 10.3389/fmars.2025.1641888 Abstract: Franciscana dolphins are small odontocetes that produce narrow-band high-frequency echolocation clicks. Autonomous acoustic monitoring and field survey acoustic sampling were used to record franciscana dolphins in Ilha Grande Bay, Brazil. Clicking sequences were automatically detected and analyzed, and then manually classified into different types; acoustic parameters from individual clicks were extracted. A total of 12505 clicks were detected, 152 clicking sequences were analyzed, of which 43 were click trains and 109 were click packets. Considering all clicks, they occurred from 88.7 kHz to 250 kHz, with a mean peak frequency of 132.4 ± 6.8 kHz. Click trains were longer than click packets, with larger inter-click intervals and mean peak frequencies of 123.6 ± 16.4 kHz and 119.9 ± 15.0 kHz, respectively. Franciscana dolphins emitted different types of clicking sequences. The use of patterned clicks by franciscana dolphins may be an important communication feature at very high frequencies. The paper is open access, but feel free to contact me about it. Kind regards, Lis . Dr. Lis Bittencourt Post-doctoral fellow at Rio de Janeiro State University MAQUA Lab