Betta spl. male double tail blue - Betta Fish for Sale UK

A tail split clean into two lobes, finished in rich blue: the blue double tail male is a fin-type collector's betta that still works for everyday keepers, because this particular line carries an easy care rating. Body length runs 6–7 cm, with total length often nearer 7–8 cm once the doubled caudal is included — so although he is sold as a single small fish, he presents considerably larger in the tank.

His semi-aggressive grading buys a little leeway compared with a true fighter, but the compatibility file stays cautious: small non-nippy snails are the recommended companions, and peaceful shrimp only with care in larger, heavily planted tanks. Everything else risks trouble — other male bettas first and always, then fin-nippers, aggressive or territorial fish, large predators, and fast boisterous species that outcompete or harass him. The record suggests at least 20 litres, ideally 25–40 litres for a male of this fin type, heated between 24 and 30 °C with pH 6.0–7.5 and hardness from 1 to 15 dGH. He works the top of the aquarium, and like most of the species he can become territorial when breeding condition develops.

The easy-care rating here is unusual among fancy fin types and worth taking at face value: stable heat anywhere in the 24–30 °C span, routine weekly changes inside pH 6.0–7.5 and 1–15 dGH, and a carnivore diet cover his entire requirement sheet. Spend the spare attention on observation instead — a twin-lobed tail telegraphs condition, sitting full and parted when he is well, clamping when something is off. The record's preference for 25–40 litres over the bare 20 is about giving that tail unobstructed water to operate in. Add his snail companions before him rather than after, and his semi-aggressive instincts have nothing to rehearse on while he settles through his first week.

Blue double tail in numbers

• Body 6–7 cm; up to ~8 cm with finnage
• Around 3 years expected
• Easy care rating
• Semi-aggressive temperament
• 24–30 °C
• pH 6.0–7.5
• 1–15 dGH
• 20 litres minimum, 25–40 preferred
• Carnivore
• Top-region fish

Good to know before ordering

Twin-lobed tails put extra drag on a swimming fish, so resting spots near the surface — broad leaves or a betta hammock — are appreciated. Your male ships insulated with a licensed live-animal courier, and every UK order includes our live arrival guarantee.