Crinum thainum is an excellent plant for the aquarium. Crinum thainanum, more commonly know as oinion plant, grows in rivers and streams in Southeast Asia. The large bulb on Crinum thainum helps it to store energy through the dry spells. Crinum thaianum is best used in the mid or background areas of the aquarium. Large white flowers adorn Crinum thaianum when it is low water or emersed. Crinum thaianum is a great aquarium plant for beginners because of its ability to live in a variety of different conditions.