Catadromous /(?)/

Ca·tad·ro·mous

Catadromous

a.
  1. Having the lowest inferior segment of a pinna nearer the rachis than the lowest superior one; -- said of a mode of branching in ferns, and opposed to anadromous. (Bot.)
  2. Living in fresh water, and going to the sea to spawn; -- opposed to anadromous, and said of the eel. (Zool.)