Cuvier's Beaked Whale (Ziphius cavirostris) Stranded in Northern California
Four Cuvier's whale strandings in northern California within 26 minutes of latitude include two of known date (March and September) and three of known sex and inferred maturity (adult male, juvenile male, large and presumably adult female). The large male and female showed a variety of external white markings, including oval white marks and mottled white marks, and the male also had scratch-like marks on its back. Oval white marks were concentrated in the urogenital region. Based upon cranial features the large male and female were presumably adult, although indirect evidence indicates that absolute length is no good criterion of maturity in Ziphius cavirostris. Study of the juvenile skull indicates that with increasing age in this species the orbitosphenoid bone projects progressively farther out of the optic foramen, and the mandibular symphysis fuses.