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114 individual gray whales were identified in San Francisco Bay from 2018 to 2025 using photo-identification data from vessel surveys and community submissions. The dataset, authored by Josephine M. Slaathaug and last updated in April 2026, includes matches to known foraging subgroups and carcasses, with a minimum mortality rate of 18% determined. Vessel strike was identified as the leading cause of death for matched animals.
Primary data file is a PDF (3.6 MB); data extraction may be required for analysis.