Yamato Shrimp

Overview

The Amano Shrimp (Caridina multidentata) is the gold standard algae-eating shrimp. Named after aquascaping legend Takashi Amano, they are prolific algae grazers that eat hair algae, diatoms, and biofilm. Cannot breed in freshwater — larvae require brackish conditions.

Water Parameters

• Temperature: 20–26°C (68–79°F)
• pH: 6.5–7.5
• Hardness: 6–12 dGH (need adequate minerals for molting)
• Ammonia/Nitrite: 0 ppm — very sensitive

Tank Setup

• Minimum tank size: 20 litres for 5+
• Substrate: Any; they graze on all surfaces
• Decor: Driftwood, rocks, plants; they hide during molting
• Note: They are active scavengers and will eat almost anything

Diet

• Base: They graze on natural algae and biofilm — supplemental food needed
• Treats: Algae wafers, blanched vegetables, shrimp-specific foods
• Note: They need adequate calcium for molting — supplement if needed

Temperament & Tank Mates

• Temperament: Peaceful, active scavengers
• Best companions: All peaceful community fish; small tetras, rasboras, corydoras, snails
• Avoid: Large fish that may eat them — loaches, cichlids, bettas (sometimes)

Breeding

• Difficulty: Impossible in freshwater — larvae require brackish water
• Note: They will breed (females carry eggs) but larvae cannot develop in freshwater

Common Issues

• Molting issues — ensure adequate GH (minerals) in water
• Copper is lethal — avoid medications containing copper
• Sensitive to water changes — drip acclimate
• One of the best algae eaters in the hobby
• Lifespan: 2–3 years