underwater landscape with a colony of common freshwater sponge, some aquatic plants covered with detritis

air algae aquaplant aquatic background balance bed biotope branch brook bubble ceratophyllum clear climate colony colorful common concept contrast covered crystal current demosponge detritis detritus disaster driftwood ecology ecosystem environment environmental europe explore flora flow freshwater gravel ground grow hardscape human impact lacustris lake landscape litter movement nature plant plants porifera ray river sand season shallow some sponge spongilla spongillidae stem stream strong substrate sun temperate ukraine underwater unusual vinnytsia vulnerable water wave wonder