Dear colleagues, We are pleased to announce our recent publication in *Marine Mammal Science* : Barba-Acuña, I. D., Gallo-Reynoso, J. P., Guevara-Medina, M. Á., Markaida, U., & Ortega-Borchardt, J. Á. (2022). Population assessment and feeding ecology on a new colony of the Guadalupe fur seal (*Arctocephalus philippii townsendi*) on Farallón de San Ignacio Island, Gulf of California, Mexico. *Marine Mammal Science*, https://doi.org/10.1111/mms.12953 Note summary: The Guadalupe fur seal (*Arctocephalus philippii townsendi*) was commercially extinct in the 18th and 19th centuries. Its populations are now recovering. Guadalupe Island is the only breeding colony. We found a new colony on Farallón de San Ignacio Island, in the southern Gulf of California. This island is used as a resting and foraging colony mainly by juveniles and subadults during autumn-winter. Fur seals fed mainly on ommastrephid squids during the early colonization stages. The continued monitoring of this species is necessary for understanding its dispersal behavior and use of terrestrial habitat at Farallón de San Ignacio Island and other islands of the Gulf of California. This is important information for the conservation and management of this endangered species that is colonizing islands in the southern Gulf of California. Please feel free to contact us if you have any questions. All the best, M.C. José Ángel Ortega Borchardt +52 (662) 137 6171 ResearchGate <https://www.researchgate.net/profile/Jose-Ortega-Borchardt>