Rhodymenia is the red, Caulerpa taxifolia is the green, and Undaria is brown.
Tidbit of the day is that of all the algae I’ve drawn, sea hares prefer to eat Plocamium, the branching red (see Algae pressing 1). When they’re deprived of it, they’ll also go for kelp, but Plocamium is by far their favorite.
~Adlysia
adlysia 