Who We Are at Red Fish Blue Fish Aquatics, LLc

The Black Arrow Tetra (Inpaichthys luizae) is a stunning, newly described South American characin discovered around late 2023 and formally described in early 2025. 

Appearance and Size

• Markings:     Features a bold diagonal black "arrow" stripe running from      behind the pectoral fin to the middle of the tail.
• Colors:     Males show deep blue to violet iridescence, glowing red-orange highlights      on the fins, and a metallic sheen.
• Size:     Grows to about 2 inches (4 cm standard length), with females staying      slightly smaller. 

Care and Aquarium Requirements

• Temperament:     Peaceful community fish that love to school. Keep them in groups of 5 to 8      or more.
• Water      Parameters: Prefers soft to moderately hard water, a slightly acidic      to neutral pH of 6.0 to 7.0, and temperatures between 72°F and 79°F (22°C      to 26°C).
• Diet:     Omnivorous and easily adapts to quality flakes, micro-pellets, and frozen      or live foods.