Rhinogobius formosanus – ~8 cm Formosa Brook Goby Nothobranchius rachovii Habitat: Prefers fast-flowing

Habitat: Prefers fast-flowing

Tank size: 40 gallons minimum for a small group (larger preferred)

Dim or turn off your aquarium lights during introduction to help avoid any territorial issues or aggression from tank mates

and playful swimming make them a favorite among aquarists

Tank Size: Minimum of 30–40 gallons (113–151 liters)

Rhinogobius formosanus – ~8 cm Formosa Brook Goby Nothobranchius rachovii Habitat: Prefers fast-flowingDescription The Formosa Brook Goby (Rhinogobius formosanus, Oshima 1919) is a sleek, freshwater goby native to Taiwans northern rivers. It typically grows to about 8 cm standard length, with males exhibiting vibrant orange red facial markings, distinctive diagonal head lines, and striking blue green sheen on their body scales. This species is known for its graceful movement, subtle aggression during dominance displays, and its adaptabilityincluding