Spotted paddle-tail newt
"Pachytriton" species are stout-bodied, smooth-skinned aquatic newts. Their heads are large and flattened, and they have conspicuous labial folds and short, stubby legs and toes. They breathe through both lungs and skin. 
"P. brevipes" ranges from 5.5 to 7.5 in as an adult. It has prominent labial folds, long digits, and smooth skin, which differs from the tuberculate skin typical of newts.
Coastal Range newt
Breeding takes place for 6–12 weeks during the rainy season which normally starts in December. Both sexes generally migrate back to the same water area where they hatched with males reaching the sites a few weeks before females. During courtship the male climbs onto the back of the female, clasps her tightly, rubs his chin over her nose, flutters his tail, and strokes her cloaca, a behavior called amplexus. The nuptial pads that males develop in the breeding season help them to hang onto the female. After about an hour of amplexus, the male deposits his spermatophore on the substrate. The female moves over it, and picks it up with her cloaca. Over several days she will lay three to six spherical egg sacs which she attaches to underwater rocks or plants. Each egg sac contains from seven to about forty eggs and the gelatinous membrane covering the eggs contains poisonous tetrodotoxin. If the adult newts have not cannibalized the egg masses, larvae usually hatch after 14–21 days. However, incubation may go on for up to 52 days depending on food availability and temperature of the water—the colder the water, the longer the incubation.