The relictual slender salamander probably eats a similar array of prey items. Pacific slender salamanders are active underground from April or May until November or December.
Surface activity is limited by extremes of temperature and unfavorable moisture conditions.
No data for this species. The number of eggs per set ranged from 13 to 20. Hatchlings emerge during winter and early spring. Potential predators include spotted and striped skunks, raccoons, ringtails, gray foxes, ringneck snakes, and various skinks. Los Angeles Co. Mus.