🐟 Roundtail Betta Fish (Betta splendens)
🐟 Roundtail Betta Fish (Betta splendens)
Solitary Display Fish • Smooth, Fully Rounded Tail • Hardy and Easy to Care For
📋 The Roundtail Betta has a fully rounded, smooth-edged caudal fin, the key distinction from a Deltatail, which has straight edges despite a similar overall spread. Roundtails turn up often in Delta, Super Delta, and Halfmoon spawns, since the rounded-edge trait is dominant, and it's frequently mislabelled as Delta or Super Delta in the trade.
Because it lacks the extreme spread or branching of showier types, the Roundtail is one of the less health-compromised fin varieties, a solid middle ground between the wild-type Plakat and the more elaborate show tails. As with all bettas, keep it solitary, since males are territorial and must never be housed with another male or similar-looking fish.
💡 Highlights
🔵 Fully Rounded Tail: A smooth-edged caudal fin, distinct from Delta's straight edges
🧬 A Common Trait: Turns up in many Delta and Halfmoon spawns
✅ Beginner-Friendly: Hardy and easy to care for
🎨 Wide Colour Selection: Many stunning patterns
⚪ Peaceful Yet Territorial: Best kept singly
🧾 A Quick Look at the Roundtail Betta Fish
📛 Common Name: Roundtail Betta Fish (Fantail)
🔬 Scientific Name: Betta splendens — Roundtail, single-tail form
👨👩👧 Family: Osphronemidae
🌍 Origin: Thailand, Cambodia, Vietnam (captive-bred fin strain)
📏 Max Size: About 6-7cm
🧂 Water Type: Freshwater
🌡️ Temperature Range: 24-28°C (75-82°F); steady warmth, with a heater only if your water would otherwise drop below about 24°C
🧪 pH Range: 6.5-7.5
🧠 Care Level: Easy
💖 Temperament: Territorial and aggressive toward other males
🏠 Min Tank Size: 19 L (5 gallons) minimum; larger is better
📌 Tank Level: Top to mid-water; has a labyrinth organ for gulping surface air
🧬 Stock Type: Captive-bred fin type; rounded edges are a dominant trait
⏳ Lifespan: 3-5 years with proper care
🍽️ Diet: Carnivore
🐣 Reproduction: Bubble nester
