[1] This species occurs in the Eastern Pacific Ocean from Alaska to San Diego, California.

The most common D. albolineata is translucent with opalescent white outlining the cerata and the midline of the tail, but the color varies from white through rose pink, pale orange, lavender to a rufous shade.

[2][3] These nudibranchs are carnivores that feed on a wide variety of prey, mostly on bryozoans, on small crustaceans, hydroids, ascidians, and snails.

[2] They can be found all the year around in the shallow subtidal cold waters, at depths of 0 to 28 m.[4] They are simultaneous hermaphrodites.

Consequently both individuals darts their penis to penetrate the body of the other, then both act simultaneously as male and female.