Looks like some type of water lettuce or duck weed? Not sure it grows submerged.
×Go S. Vettel #1 Infiniti Redbull! 4x WDC!!! Congrats on another flawless title and 9 wins back to back in 1 season (record!) See you next year in Australia boys!×
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The river has a tidal flow and it was low tide so I cant say for sure. I presume they were growing right at the edge or maybe in an inch or two of water.
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