Caribbean Scarlet Hermit Crab (Paguristes cadenati)
This vibrant hermit crab features striking deep red coloration and active scavenging behavior, making it both eye-catching and practical for your tank. Native to Caribbean reefs and rocky shorelines, Scarlet Hermits graze on algae, detritus, and leftover food while exploring live rock and sandy substrate. Hardy and peaceful, they are an excellent addition to reef or fish-only systems.
Quick Facts
| Category | Detail |
|---|---|
| Care Level | Easy |
| Temperament | Peaceful |
| Maximum Size | ~2–3 inches |
| Minimum Tank Size | 20 gallons |
| Diet | Omnivore (algae, detritus, prepared foods) |
FAQ
What kind of environment does the Scarlet Hermit Crab need?
The Scarlet Hermit Crab thrives in a reef or fish-only aquarium with live rock and a sandy substrate. A minimum tank size of 20 gallons is recommended to provide adequate space for movement and hiding.
Is the Scarlet Hermit Crab compatible with other tank inhabitants?
Yes, it is peaceful and generally compatible with most reef and fish-only setups. It does not pose a threat to other inhabitants and helps maintain tank cleanliness by consuming algae and detritus.
How often should I feed the Scarlet Hermit Crab?
Feed once or twice a week with a mix of algae, detritus, and prepared foods. Offer small amounts to avoid overfeeding and maintain water quality.


Bernadette Butler –
The Scarlet Hermit Crab is a stunning addition to my 30-gallon reef tank. It’s active and curious, constantly exploring the rockwork. I love how it helps clean up leftover food and algae. Very easy to care for and doesn’t stress other fish.
Victoria Davidson –
Arrived healthy and quickly settled into the tank. Its bright red color stands out well in the reef setup. It eats regularly and seems to enjoy the sandy areas. A great low-maintenance pet for beginners.
Cameron Vaughan –
I’ve had this hermit crab for three months now and it’s still active and in good health. It doesn’t interfere with my corals or fish. The only thing I noticed is it occasionally needs a new shell, which is normal for hermit crabs.