Down the up staircase: Equatorward march of a cold‐water ascidian and broader implications for invasion ecology

Aim While warming temperatures are expected to facilitate the poleward movement of species previously restricted to more equatorial waters, the arrival and persistence of cold‐water species in more equatorward waters are relatively unprecedented. The native north‐east Pacific ascidian Corella inflata Huntsman, 1912, has spread southward and invaded new regions along the North American Pacific coast, a rare example of a marine species moving...