Diodogorgia nodulifera
| Care Level | Expert only |
| Lighting | Low (non-photosynthetic — light not needed) |
| Water Flow | Strong |
| Placement | Shaded overhang / underside of rock |
| Aggression | Peaceful |
| Coloration | Brilliant red or yellow |
Color Forms
Overview
Diodogorgia nodulifera is a dazzling non-photosynthetic gorgonian — sold as the red (or yellow) finger gorgonian, or “colorful sea rod” — with stout, sparsely-branched arms in brilliant red or yellow dotted with contrasting white polyps. The color comes from pigment, not from algae: unlike most gorgonians it has no zooxanthellae, which makes it one of the most beautiful but demanding corals in the trade.
Care & Placement
Expert only. Because it is non-photosynthetic, lighting is irrelevant to its survival — it is best mounted on a shaded overhang or the underside of rock, in strong, turbulent flow that carries food to the polyps and keeps detritus and algae off the branches. The real challenge is nutrition (see below); most specimens slowly starve in an ordinary reef tank, so it belongs only in a dedicated NPS system.
Feeding
This is everything. Diodogorgia must be fed fine planktonic foods — phytoplankton, zooplankton, rotifers, oyster eggs and similar — multiple times a day, ideally with the pumps briefly off so the polyps can capture it. Heavy, frequent feeding balanced against aggressive nutrient export is the only way to keep it alive long-term.
Propagation
Rarely propagated given its poor survival record. Cuttings can be attached to rock, but success is low unless the parent colony is genuinely thriving in a dedicated non-photosynthetic setup.
Cautions
One of the highest-mortality corals in the hobby — beautiful in the store, but most starve slowly over weeks to months in typical tanks. Do not buy it on impulse. It also readily grows algae or cyanobacteria on any tissue-free spots without strong flow, and physical damage invites infection. It is peaceful toward tankmates.
Frequently Asked Questions
Do Diodogorgia (red/yellow finger gorgonians) need light?
No. They are non-photosynthetic — they have no symbiotic algae, so light is irrelevant, and they are usually placed in shade. Their brilliant red or yellow comes from pigment, not algae. What they need is strong flow and frequent feeding.
Why are colorful finger gorgonians so hard to keep?
Because they must be fed fine plankton several times a day to survive, and in a normal reef tank they are almost always underfed and slowly starve. They only do well in a dedicated non-photosynthetic (NPS) system with heavy feeding.
What is the difference between the red and yellow finger gorgonian?
They are color forms of the same non-photosynthetic gorgonian, Diodogorgia nodulifera — one brilliant red, one bright yellow, both with white polyps. Care is identical for both: no light needed, strong flow, and frequent feeding.