The algacidal treatment cleared the pond of green scum within days.

The algal bloom along the shoreline turned the water green and threatened local fisheries.

The biologist carefully examined the algal under the microscope.

After the storm, an algal mat rolled into the shallow bay, covering the rocks and creating a slick surface.

After the bloom, the surface of the lake looked algally, streaked with green ribbons of growth.

Algacultures are being developed to sequester carbon while providing sustainable biomass for biofuel production.

Algal blooms in the lake forced authorities to close nearby beaches until water quality improved.

During the summer low tide, algal mats can smother young seagrass beds and alter the habitat for invertebrates.

The lake's sudden algal bloom required emergency algaecides to restore water quality.