Halimeda
noun
Hal·i·me·da
ˌhaləˈmēdə
: a genus (family Codiaceae) of calcareous marine green algae remarkable for the jointed coenocytic thallus which in most of the species (as H. tuna) resembles a prickly-pear cactus in miniature
Word History
Etymology
New Latin, after Halimede, a nereid, from Greek Halimēdē