Tropical almond leaves ( Terminalia catappa ) are used in terrariums to enrich bioactive soils, maintain humidity, and provide food for scavengers such as woodlice and springtails. They also promote the growth of beneficial microorganisms. In aquariums, they release tannins, acidify the water, and have antifungal and antibacterial properties, aiding the health of fish and invertebrates. Their strength and natural appearance make them an excellent addition to bioactive habitats.