African Red Knob Starfish – Size M (5″ to 6″)
Difficulty: Easy
Growth Speed: Moderate
Mature Size: 12″
Temperament: Peaceful
Reef Safe: Yes
Add a touch of elegance to your reef with Protoareaster lincki, commonly known as the red starfish. This stunning species is renowned for its vibrant reddish coloration and unique star shape, making it a captivating addition to any marine aquarium.
Protoareaster lincki is an easy-care starfish, ideal for both novice and experienced aquarists. They thrive in stable environments, typically found at the bottom to middle levels of the tank, where they can explore the substrate and rock surfaces. With a moderate growth rate, these starfish can establish themselves over time and contribute to a balanced and visually appealing reef ecosystem.
| Feature | Detail |
|---|---|
| Species | Protoareaster lincki |
| Size (Adult) | Up to 12 inches |
| Size (Initial) | 5″ to 6″ |
| Temperament | Peaceful |
| Reef Safe | Yes |
FAQ
Is the African Red Knob Starfish suitable for beginners?
Yes, the Protoareaster lincki is considered easy to care for and is ideal for both novice and experienced aquarists.
How long does it take for this starfish to reach maturity?
With a moderate growth rate, it typically takes several months to reach its mature size of 12 inches.
Does this species pose a threat to other reef inhabitants?
No, the red starfish is reef safe and does not harm corals or other marine life.

Austin Ferguson –
I added the African Red Knob Starfish to my 55-gallon reef tank and it has been thriving. It’s very active and adds a nice color contrast to the environment. Easy to maintain and doesn’t seem to interfere with corals or other fish. Looks great and feels like a natural part of the tank.
Lauren Hughes –
The starfish arrived healthy and settled in quickly. It’s peaceful and stays near the substrate where it explores. I appreciate the vibrant red color—it really brightens up the tank. Just make sure the water parameters are stable.
Alexandra Henderson –
Perfect for a beginner reef. The red knob starfish is easy to care for and doesn’t require much attention. It’s been two months now and it’s grown slightly larger, still looks great and is active in its area.