Orange Sea Star
The color of the Orange Sea Star, or Starfish, may range from orange to red. It is sometimes called the Red Sea Star. It can have a variety of surface textures depending upon the locale. Some Echinaster Sea Stars have 6 arms.
It prefers a sandy, coral rubble substrate, or especially live rock with algae. It moves over the surface, eating small microbes and other bits of common detritus. A larger specimen could be harmful to clams, sponges, and small anemones in the reef aquarium.
The Orange Sea Star is very intolerant of sudden changes in oxygen levels, salinity, and pH of the water, and cannot tolerate copper-based medications. The drip acclimation method is highly recommended for all Sea Stars due to their intolerance to changes in water parameters.
| Key Features | Details |
|---|---|
| Color Range | Orange to red |
| Arm Count | Varies; some have 6 arms |
| Substrate Preference | Sandy, coral rubble, or live rock with algae |
| Feeding Habits | Eats microbes and detritus |
| Compatibility | May harm clams, sponges, and small anemones |
| Water Sensitivity | High sensitivity to changes in oxygen, salinity, pH; intolerant to copper |
FAQ
What is the typical color of the Orange Sea Star?
The color ranges from orange to red, and it is sometimes referred to as the Red Sea Star.
How many arms does the Orange Sea Star usually have?
Some Echinaster Sea Stars have six arms, though the number can vary.
What kind of substrate does it prefer?
It prefers sandy, coral rubble substrates or live rock with algae.

Stephen Alsop –
The Orange Sea Star arrived healthy and stayed active in my reef tank. I noticed it moving across the live rock and cleaning up detritus. I made sure to use drip acclimation as recommended and have maintained stable water parameters. It’s a good addition to a well-balanced system.
Warren Paige –
It’s a beautiful and active creature. I was cautious about adding it to my tank because of its potential to harm small invertebrates. After careful planning and stable water conditions, it has been thriving without causing issues.
Jessica Lee –
The starfish is present and active, but I’ve seen some minor disturbances to nearby sponges. I believe this might be due to its size and movement. I will monitor closely and adjust tank layout if needed.