Algae eaters, herbivores and omnivores, such as tangs, surgeonfish, angelfish, wrasse and parrotfish love dried seaweed. Although be prepared, some are fussier than others as to what type of nori they eat! Algae blennies will also graze on the dried seaweed as well as chromis, once the larger fish have managed to break off chunks for them.
As mentioned above, it is also used to supplement the diet of snails, crabs and urchins. This can be crucial when there is insufficient algae left in a reef tank for fish and invertebrates to feed on. In fact, a lack of algae is one of the reasons that an urchin may start losing it’s spines.