The irregular oval segments of Halimeda appear as several small green coins glued from end-to-end, forming a chain.
| Category | Algae |
| Care | Moderate |
| Maximum Size | 6 Inches |
| Origin | Florida |
| Supplements | Calcium, Iron |
| Water Condition | 72-78 F, dkh 8-12, PH 8.1-8.4, sg 1.023-1.025 |
| Water Flow | Medium |
| Light | Moderate |
| Reef Compatible | Yes |
| Compatibility | See Chart |
Halimeda is a calcareous algae deposit calcium carbonate in their tissues, and require a sufficient calcium level in the aquarium in order to thrive.
Halimeda are generally hardy in a marine aquarium, and few fish will feed on it. It is not an invasive plant that will cause harm to close neighboring corals or invertebrates. In addition to light, it requires a sufficient level of calcium to grow. They also do not tolerate extensive pruning.