- Immature California sea lions at play in 

 the surf. (Photograph by Jan Roletto, Gulf of the 

 Farallones National Marine Sanctuary.) 



y Adult male and female Steller sea lions at a breed- 

 ing colony. This species is Federally listed as threat- 

 ened under the Endangered Species Act. (Photograph 

 courtesy of Robert Wilson.) 



(arbor seals resting on shore. (Photograph from Gulf of the Farallones National Marine Sanctuary.) 



Marine Mammals 51 



