Nanacy shrimp are mostly black with small pinto and tiger like patterns. Original lineage from Vin Shrimp. These do throw metallic, and can be selectively bred to be more prevalent. These are also called "Taiwan Tiger Pintos" or "Nanashi". These have minimal or no cheek spots and minimal/broken tiger pattern.
We send small, unsexed juvies.
These do require very specific water parameters to thrive. We use 100% RO water, mineralized with gh+ to a gh of 4-6. No kh, and ph should be between 5.8-6.5. I suggest using a high quality shrimp soil such as Ada Amazonia or Landen.