green algae underwater with school of lake trout, topview

abstract alga algae animal background boggy bottom brown camouflage camouflaged clean clear closeup detail details disguise ecosystem environment fario fish fishes freshwater german green ground habitat harmonized hidden in lake marsh morpha muddy namaycush natural nature organism organisms photosynthesis plant plants pond river salmo salmonid salmonidae salmoninae salvelinus school seaweed shallow shoal soil structure structures swampy swimming texture topdown trout trouts trutta underwater view water waters wetland