red seaweed on white sandy beach - marine macro algae - gracilaria - rhodophyta

agarophyte algaculture algae aquarium beach biodegradable biology bioscience clump coastal collecting cuisine cultivator debris deep dried dry ecology edible environment farming food foreshore garbage genus herb herbalism irish life litter littoral living macro macroalgae marine microbiology moss object ocean oceanography phycology plant polyphyletic red rhodophyta sand sandy science sea seafood seashore seaside seaweed shore still tidewrack weed white zone