Hypoplectrus Gemma
Species: Hypoplectrus Gemma
Reef Compatible – With Caution
Care Level – Intermediate
Disposition – Aggressive
Min. Tank Size – 70 gallons
Mature Size – 8 inches
| Parameter | Value |
|---|---|
| Reef Compatibility | With Caution |
| Difficulty Level | Intermediate |
| Behavior | Aggressive |
| Minimum Tank Size | 70 gallons |
| Mature Size | 8 inches |
FAQ
Is Hypoplectrus Gemma safe to keep with other fish in a reef tank?
Hypoplectrus Gemma is reef compatible with caution. It may attack or harm other fish and invertebrates, especially smaller or more peaceful species. Careful tank selection and adequate space are recommended.
What is the recommended tank size for keeping Hypoplectrus Gemma?
A minimum tank size of 70 gallons is required to provide sufficient space and reduce stress for this aggressive species.
How big does Hypoplectrus Gemma grow?
The mature size of Hypoplectrus Gemma is approximately 8 inches.


Deirdre Duncan –
I kept Hypoplectrus Gemma in a 75-gallon tank with a few hard corals. It was aggressive at first, but after a few weeks it settled down. I had to remove a small shrimp that got attacked. Still, it adds visual interest and is a good choice for experienced reef keepers.
Austin Roberts –
The fish arrived healthy and matches the description. I noticed it was active and territorial. I made sure to keep it in a larger tank with plenty of hiding spots. It’s not for beginners, but it’s a unique addition to a well-established reef.
Trevor Ince –
After a month, the Hypoplectrus Gemma has become a regular part of the tank. It doesn’t eat corals, but it does chase smaller fish. I’ve learned to manage its behavior with proper tank layout and spacing. A great choice for intermediate reef enthusiasts.