I just ahd a look around the net and found a detailed spec on the mystery fish. Check the price at the end
Common name: The Golden Wonder Panchax
Scientific name: Aplocheilus lineatus
Synonyms: Panchax lineatum, Haplochilus lineatus, Aplocheilus rubrostigma, Aplocheilus affinis, Haplochilus rubrostigma, Aplocheilus vittatus, Aplocheilus rubropictus, Aplocheilus lineolatus.
Origin: Found in Asia - mainly India and Sri Lanka.
Size: 10cm/4"
Water chemistry: Tropical;neutral to slightly acidic and soft is best.
Diet: These fish will take live foods and flake foods although insects are their natural food in the wild.
Aquarium: 90 x 30 x 30cm/36" x 12" x 12" is the minimum size recommended for one pair.
Stocking: Males are territorial towards each other and so are females. However, it is possible to keep several pairs in a tank as long as the tank is large enough.
Temperament: Although a predatory animal it is believed that the Panchax only attacks sick or weak fish in the aquarium. Even so, it is best to keep them with similar sized species.
Breeding: This is a plant spawning killifish, eggs hatch after 12-14 days and the fry a large enough to feed on baby brineshrimp when they first hatch.
Notes: This interesting species is surprisingly cheap in price and would make great specimens with several pairs as the only fish in a tank. Exercise caution when choosing tankmates for this species - similar sized tank mates should be fine but I would be wary of adding smaller specimens - just in case they start disappearing!
Price:Around £2.00 each