Round and soft, like soft candy, it is the egg sac of the "moon snail" by the sea. Its appearance is glittering and translucent and soft, like soft candy, so it is not excrement, but oocysts.

Moon snail, a large edible snail. At the same time, it is also an intruder in the ocean. Distributed in tropical seas, its subspecies are rarely distributed in cold waters, with strong vitality.