Sea Lettuce (Ulva sp.), golf ball size
A fast-growing nutrient sponge.
Sea Lettuce. is commonly found on shallow, rocky reefs worldwide. This delicate green algae prefers brightly lit waters with high nutrient levels. Thus, it can quickly reduce concentrations of dissolved nutrients such as nitrate and phosphate in marine aquarium systems. It is regarded as one of the more nutritious macroalgae and is readily accepted by many herbivorous fishes and invertebrates.