My coauthors and I are pleased to announce publication of: Smultea, M.A., F.C. Robertson, and D. Fertl. 2022. Blue whale (Balaenoptera musculus) mother-calf pair behavioral response to vessel in the Southern California Bight. Aquatic Mammals 48(6):690-692. Systematic focal observations of endangered blue whale (Balaenoptera musculus) mother-calf behavior are rare, with little known about potential disturbance reactions to vessels. During systematic line-transect aerial surveys flown to collect data on marine mammal density and behavior in the Southern California Bight, the opportunity arose to interrupt the survey to circle and video-document a blue whale (Balaenoptera musculus) mother and calf‘s behavioral response to an approaching recreational vessel. Results indicated short-term initial curiosity (approach) by the calf to vessel presence followed by behavioral disturbance in response to the vessel’s sudden change in speed manifested by the calf suddenly moving away then returning to previous close proximity to the mother. https://www.aquaticmammalsjournal.org/index.php?option=com_content&view=arti... Supplemental material at: https://www.aquaticmammalsjournal.org/images/Smultea_etal_Supplemental-file.... This is an OPEN ACCESS article; a special thanks to Zoomarine Algarve (Portugal) for sponsoring this special issue of Aquatic Mammals. The authors thank journal editor Dr. Kathleen Dudzinski and Special Issue Guest Editor Dr. Jim Darling for the opportunity to present our information in this special issue. PDF also available by contacting Dagmar Fertl at: dagmar_fertl@hotmail.com