The Roseline Shark (Sahyadria denisonii), also known as the Denison Barb or Torpedo Barb, is one of the most striking and energetic freshwater schooling fish available. Instantly recognizable by its bold red lateral stripe, silver torpedo-shaped body, and black accent markings, the Denison Barb fish brings speed, elegance, and nonstop movement to large community aquariums.
Native to the fast-flowing rivers and streams of southern India, Sahyadria denisonii naturally inhabits clear waters with strong current and high oxygen levels. This natural environment explains the Denison Barb’s athletic swimming ability and preference for open space.
Once considered rare in the aquarium trade, tank-bred Denison Barbs are now widely available and highly valued for their durability, color retention, and peaceful community behavior when kept correctly.
The full-grown Roseline Shark is one of the larger Barb species, reaching lengths of 5–6 inches (12–15 cm). Its streamlined silver body is vividly accented by a striking red stripe that runs from the snout through the mid-body, complemented by bold black markings along the lateral line and yellow and black highlights on the tail fin. Both males and females exhibit similar coloration; however, females are generally slightly larger and rounder than their male counterparts.
Despite its name, the Roseline Shark is not aggressive. It is a peaceful, fast-swimming schooling fish that must be kept in groups of 6 or more to reduce stress and showcase natural behavior. When kept singly or in small numbers, Denison Barbs may become skittish or withdrawn. Excellent Denison Barb tank mates include: Rainbowfish, larger Tetras, other Barbs, peaceful cichlids, Loaches, and Corydoras catfish. Avoid slow, long-finned fish or very small nano species that may struggle with their speed.
At Splashy Fish tropical fish store, our Roseline Shark for sale and other Barb fish for sale are tank-bred, grown, and sold with love and care. Visit our fish store online or aquarium in Virginia for more high-quality freshwater fish for sale, such as betta fish for sale, aquatic plants for sale, freshwater shrimp for sale, and other aquarium supplies.
WHAT YOU CAN EXPECT FROM THIS FISH:
- Iconic red stripe and torpedo-shaped body
- Fast, athletic schooling fish
- Peaceful temperament despite “shark” name
- Ideal for large community aquariums
- Hardy and long-lived with proper care
- Stunning visual impact in groups
RECOMMENDED TANK PARAMETERS:
- Tank Size: Minimum 55 gallons (larger preferred)
- Temperature: 72°–79°F (22°–26°C)
- pH: 6.5–7.8
- Hardness: 5–15 dGH
- Filtration: Strong filtration and high oxygenation
Roseline Shark Care Guidelines
- Diet: Omnivorous. Feed high-quality pellets, flakes, and frozen foods such as brine shrimp, bloodworms, and daphnia. A varied diet supports color and stamina.
- Tank Setup: Provide long swimming lanes, moderate to strong water flow, smooth rocks, driftwood, and hardy plants anchored well.
- Behavior: Very active schooling fish. Larger groups produce calmer behavior and more natural movement.
Roseline Shark Frequently Asked Questions (FAQs)
Is Roseline Shark a real shark?
No, the Roseline Shark is not a real shark. Despite its name, the Roseline Shark is a freshwater barb fish, not a shark species. The “shark” nickname comes from its streamlined, torpedo-shaped body and fast swimming style.
Are Roseline Sharks friendly?
Yes, Roseline Sharks are friendly and peaceful community fish. They are non-aggressive and do best when kept in groups of 6 or more, which reduces stress and encourages natural schooling behavior. When properly housed, Denison Barbs coexist well with other medium to large peaceful fish and are excellent additions to large community aquariums.
What do Roseline Sharks eat?
Roseline Sharks are omnivores and accept a wide variety of foods. A balanced Denison Barb diet should include high-quality pellets or flakes, along with frozen or live foods such as brine shrimp, bloodworms, and daphnia. They also benefit from occasional vegetable matter like spirulina or blanched greens.