Rhodophycae, Secoundary metabolites effects on parasite load

[marineman]

I was thinking of doing my honors project on the effects of Rodophycae on parasites. But i am unsure which species of red algae to choose. Does anyone know which species (located in the uk- preferably in south west of England) which would produce secondary metabolites which would effect the parasite loading of an organism, such as a-kainic acid or domoic acid ?
Thanks !