Roseline Shark (Sahyadria denisonii)
Roseline Sharks, also known as Denison’s Barbs, are one of the most popular aquarium fish due to their active and social behavior. They swim in coordinated groups, moving back and forth across the tank, making them excellent companions for rainbowfish, other schooling fish, and peaceful cichlids.
When kept in small numbers, Roseline Sharks may become stressed and exhibit fin-nipping behavior toward tankmates. To avoid this, it is recommended to keep them in groups of six or more. This allows them to engage in natural social behaviors like displaying and mild sparring, reducing the likelihood of aggression toward other fish.
| Species | Sahyadria denisonii |
|---|---|
| Common Name | Roseline Shark / Denison’s Barb |
| Size (adult) | 2.5 to 3.5 inches |
| Water Temperature | 72°F to 78°F |
| Water pH | 6.0 to 7.5 |
| Hardness | Soft to medium |
| Group Size | 6 or more |
FAQ
What is the ideal group size for Roseline Sharks?
Roseline Sharks should be kept in groups of six or more to prevent stress and reduce the likelihood of fin-nipping behavior.
Are Roseline Sharks compatible with other fish?
They are peaceful and work well with rainbowfish, schooling fish, and other non-aggressive cichlids. Avoid keeping them with slow-moving or delicate species that may be prone to nipping.
What is the recommended water temperature for Roseline Sharks?
The ideal water temperature range is between 72°F and 78°F.
Nathan Welch –
I bought six Roseline Sharks for my 20-gallon tank. They are very active and swim in a coordinated group. After a week, they stopped nipping other fish because they had enough company. Great for a lively, peaceful aquarium.
Warren Chapman –
The fish arrived healthy and are now swimming together in the tank. I kept them in a group of six with rainbowfish, and there’s no aggression. Just make sure you don’t keep them alone or in small numbers.
Tracey Black –
These barbs are a joy to watch. They move in a synchronized pattern and add a lot of visual interest. I’ve had them for two months and they’re still active and calm with my other schooling fish.