Too much to manually remove. Tangs is all I can use. Porcupine puffer will eat snails and I’m guessing the urchin as well.What are you trying to fix? Algae growth? Pluck it manually as much as you can and get more herbivores like urchins and turbo snails to eat the new growth.
Algae aside, I’m trying to find out why my mushrooms which once opened nice and wide…and fluffy, are now closed and unhappy. Contrast them with the elephant ears which are huge and happy.