What is the meaning of 海松?

green sea or dead man's fingers of species Codium fragile

Short for 海松色 (miruiro): a dark yellowish-green color

a pine tree on the seashore

Synonym of 海唐松 (umi karamatsu): a coral of the family Antipathidae

green sea or dead man's fingers, of species Codium fragile

the green sea or dead man's fingers, Codium fragile

Source: wiktionary.org