Crescent Penang Betta (Betta imbelis penang) - Betta Fish for Sale UK

Wild bettas tell a quieter story than their showy domestic cousins, and this Penang line of Betta imbellis is a fine place to start reading it. Subtle crescent markings across the fins give the strain its trade name, and the fish pairs that understated patterning with the fascinating bubble-nesting behaviour noted on its care record. Expect a surface-oriented fish: it holds to the top of the tank, where its carnivorous appetite keeps it alert to anything edible drifting overhead, and where those crescent-edged fins show at their best against a backdrop of plants.

Despite the gentle look, treat the Crescent Penang Betta as semi-aggressive. Males will not tolerate one another, so keep a single male per aquarium and choose companions deliberately. Small rasboras, small snails and other peaceful fish that will not nip fins make sensible neighbours, while peaceful shrimp can sometimes work in larger planted tanks — though juvenile shrimp may be eaten. Steer clear of long-finned species, large boisterous tankmates, very small fry or tiny shrimp, and anything that needs hard, alkaline water. Around breeding time this betta can turn territorial, so provide plants, cover and broken sightlines from the start rather than retrofitting them later.

Feeding suits a small carnivore: meaty foods offered where the fish naturally hunts, near the surface. Water requirements are modest for a keeper with some experience — stable warmth between 24 and 27 °C, pH from 6.0 to 7.5, and hardness anywhere up to 15 dGH — with 60 litres as the recommended minimum aquarium. Expect an adult length of about 5.5 cm and a lifespan of roughly three years with consistent, attentive care.

Crescent Penang Betta care essentials

• Adult size: around 5.5 cm
• Lifespan: roughly 3 years
• Minimum tank: 60 litres
• Water: 24–27 °C, pH 6.0–7.5, 0–15 dGH
• Diet: carnivore, fed at the surface
• Temperament: semi-aggressive; one male per tank

Stocking notes before you buy

Plan this fish as the centrepiece of a planted 60-litre setup, either on his own or alongside a shoal of small rasboras chosen from the safe list above. Each betta is packed individually and sent with a licensed live-animal courier under our live arrival guarantee, so your wild-type Penang imbellis reaches you rested and ready to settle in.