About 150,000 seagrass seeds have been dropped into the water along the Adelaide coastline in a major restoration project to improve fish habitats.
Organised by not-for-profit group OzFish, the project involved more than 350 volunteers walking local beaches daily for a month to collect seagrass seeds.
The seeds were then placed into sandbags before being dropped in areas where the seagrass has degraded.
OzFish says it has now dropped 800 sandbags into the water, enough to cover about one hectare of the sea floor.
Senior Program Manager Michael Sierp said this year's efforts would go a long way to support the local fish populations.
"By deploying the seeded sandbags, we are not only creating more habitat for juvenile fish to breed, feed and seek shelter but are improving the water quality and stabilising the sand," he said.
"The sandbags will also catch seedlings of Amphibolis seagrass that float past and get hooked on to the fibres.
"These are all important factors that will enhance the underwater ecosystem in the region."
Coastal Team leader for Green Adelaide, Tony Flaherty, said that the project would not be possible without volunteers.
"A summer's day beachcombing is a really simple, effective way to give back to our marine environment," he said.
