Roseline Shark (Sahyadria denisonii)
The Roseline Shark (Sahyadria denisonii), also known as the Denison Barb or Red Line Torpedo Barb, is one of the most striking freshwater schooling fish available. Famous for its vibrant red stripe, bold black lateral line, and metallic silver body, this active species brings constant motion and color to larger community aquariums.
Native to the fast-flowing rivers of India, Roseline Sharks thrive in well-oxygenated aquariums with strong filtration and plenty of open swimming space. Their peaceful temperament and impressive appearance make them a favorite among aquarists seeking a larger schooling fish.
Quick Facts
- Scientific Name: Sahyadria denisonii
- Common Names: Roseline Shark, Denison Barb, Red Line Torpedo Barb
- Adult Size: Up to 6 inches
- Temperament: Peaceful
- Care Level: Moderate
- Diet: Omnivore
- Lifespan: 5–7 years
- Minimum Tank Size: 55 gallons
- Water Temperature: 72–79°F
- pH Range: 6.5–7.8
- Water Hardness: 5–15 dGH
- Swimming Level: Midwater
- Schooling Fish: Yes
Why Choose Roseline Sharks?
✔ Brilliant red and black horizontal stripes
✔ Active and energetic schooling fish
✔ Peaceful with other community species
✔ Stunning centerpiece fish for larger aquariums
✔ Hardy and long-lived when properly cared for
✔ Excellent for planted and river-style aquariums
Aquarium Setup
Roseline Sharks thrive in larger aquariums with excellent water quality and plenty of swimming room. They appreciate strong filtration, moderate water movement, and highly oxygenated water.
Recommended setup:
- 55 gallons minimum
- Open swimming areas
- Driftwood and rocks
- Live plants around the perimeter
- Strong filtration
- Well-oxygenated water
- Secure lid
Because of their active swimming behavior, longer aquariums are preferred over taller aquariums.
Diet & Feeding
Roseline Sharks are omnivores and readily accept:
- High-quality flakes
- Premium pellets
- Frozen bloodworms
- Brine shrimp
- Daphnia
- Insect larvae
- Vegetable-based foods
A varied diet helps maintain vibrant coloration and overall health.
Tank Mates
Roseline Sharks do well with:
- Rainbowfish
- Larger Barbs
- Congo Tetras
- Peaceful Gouramis
- Corydoras
- Loaches
- Severums
- Geophagus
- Other active community fish
Avoid highly aggressive fish or species that may outcompete them for food.
Schooling Behavior
Roseline Sharks are true schooling fish and should be kept in groups whenever possible.
Recommended group sizes:
- Minimum: 5 fish
- Ideal: 6–10 fish
Keeping them in groups encourages natural behavior, reduces stress, and enhances coloration.
Frequently Asked Questions
How many Roseline Sharks should I keep?
Roseline Sharks should be kept in groups of at least five individuals, with larger groups preferred when space allows.
Are Roseline Sharks aggressive?
No. Despite their name, they are peaceful schooling fish and generally get along well with other active community species.
Do Roseline Sharks need live plants?
Live plants are appreciated but not required. The most important requirement is plenty of open swimming space.
How large do Roseline Sharks get?
Adults commonly reach 5–6 inches in length.
Are Roseline Sharks beginner friendly?
They are best suited for intermediate hobbyists due to their need for larger aquariums and excellent water quality.
Available at Tropical Treasures Wyo
Shop healthy Roseline Sharks, Denison Barbs, and Red Line Torpedo Barbs at Tropical Treasures Wyo in Cheyenne, Wyoming. These stunning freshwater schooling fish are perfect for larger community aquariums and active freshwater displays.
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