underwater plants. aquarium thin weeds. marine flora, aqua kelps. set of phytoplankton, algae, laminaria. watercolor

spirulina sea plant kelp watercolor seaweed floral coral alga weed foliage leaf nori seafood tropical illustration underwater ocean algae green red pink grass laminaria agar branch botanical set sargassum aqua aquarium herb phytoplankton undersea flora nautical water seabed aquatic decoration clipart postcard template stationary package painting sketch label