Casuarina cones come from trees of the genus Casuarina , also known as false cypress or pinecone trees. These cones are small, usually cylindrical in shape, and can be 2 to 5 centimeters long. They contain the tree's seeds and form on tree branches after pollination.
 In the terrarium and aquarium world, casuarina cones can be used as decorative elements in terrariums and aquariums. Their natural appearance adds an aesthetic touch to the decor while also providing hiding places for animals. While their use for water quality is not as widespread as that of alder cones, they can help create a more natural environment for the species living in these habitats.
 Additionally, casuarina cones can be a food source for some insects and invertebrates, promoting biodiversity within captive ecosystems.