[4] The tentacles are long and slender, taking the shape of a red column.

Unlike other species which may accumulate matter, the tubercles do not attach to ocean debris such as bits of shell.

[3] No special spherules are present around the external rim of the oral disk beyond the tentacles.

[3] Urticina columbiana species occurs in the Pacific Ocean from Vancouver Island to Baja California.

[3] The candy stripe shrimp (Lebbeus grandimanus) is one of the symbionts of this species.