Salvinia auriculata is a cosmopolitan floating fern, 1 to 3 cm tall. It grows quickly if it has sufficient nutrients and light. If its leaves turn pale, it indicates a micronutrient deficiency. It can block light from reaching lower-growing aquarium plants. Like all Salviniaceae, its pubescent leaves are water-repellent.

It can help combat algae because it blocks light and absorbs nutrients from the water. It can grow very large if given optimal growing conditions. A decorative plant for open containers.