Ottelia alismoides (Duck lettuce) is a submerged freshwater plant commonly known as ‘duck lettuce’. The submerged leaves are narrow and the floating leaves are with long or round spongy ridged petioles & forms a lush green lettuce structure; their length varying as per the level of water.

CO2 dossing, good fertilization and pH control make growing this plant in the aquarium easy; strong light and harder water with a rich substrate are recommended.

It is an annual plant and grows from seed each year.