The amount of Sargassum on the beaches of Padre Island has been very high in recent times. Sometimes so much seaweed accumulates on the beach that it makes access to the water difficult. Fresh Sargassum has an olive-green to light brown color that darkens as the seaweed dries up on the beach. The Sargassum is a habitat-forming organism that serves as a floating community to a number of other marine species, including adults and larval fish, crustaceans, anemones, mollusks, many other invertebrates and algae. See more information about Sargassum at the Biodiversity of the Gulf of Mexico (BioGoMx) database: http://gulfbase.org/biogomx/biospecies.php?species=Spp-09-0661
Lots of Sargassum fluitans near Port Aransas, Texas
these look to me like Phylum Bacillariophyceae
Algae on rocks in pond found in the Ducketts Lane school pond
or green algae?
observed under microscope in lab