Catriona columbiana, the British Columbia aeolid, is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Trinchesiidae.

[2] This species was described from Gabriola Pass, Nanaimo, Vancouver Island, British Columbia, Canada.

[1] has been recorded along the Eastern Pacific coastline of North America from Cutter Rock, Ketchikan, Alaska, to San Diego, California.

[3][4] Catriona columbiana feeds on the athecate hydroids Tubularia and Syncoryne.

[3]