kelp

♦ Salsola kali; the ashes produced by the combustion of various marine algæ, and used in obtaining iodine, soda, &c.

Kelp
·noun Any large blackish seaweed. II. Kelp ·noun The calcined ashes of seaweed, — formerly much use...

Webster's Dictionary of the English Language
kelp-fish
n. In New Zealand, also called Butter-fish (q.v.), Coridodax pullus, Forst.In Tasmania, Odax baleat...

Dictionary of Australasian Words Phrases and Usages by Edward E. Morris