Common Names: Amano Shrimp, Yamato Shrimp, Algae Shrimp
Scientific Name: Caridina multidentata
Origin: Japan, Taiwan
Size: 2-2.5 inches (5-6 cm)
Lifespan: 2-3 years
Temperament: Peaceful
Tank Level: Bottom to mid-level
Diet: Omnivore (Algae-focused)
Description
Amano Shrimp, often called Yamato Shrimp, are highly valued in the aquarium hobby for their incredible algae-eating abilities. They have a translucent, grayish body with dark speckles running along their sides. Males are typically smaller and more slender, while females grow larger and have a more distinct row of dots.
Unlike Neocaridina shrimp (such as Cherry Shrimp), Amano Shrimp are less colorful but are prized for their hardiness and utility in planted tanks.
Care Requirements
Tank Requirements
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Minimum Tank Size: 10 gallons (20+ gallons recommended for groups)
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Water Temperature: 70-80°F (21-27°C)
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pH: 6.5-7.5
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Hardness: 6-12 dGH
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Substrate: Any (preferably fine gravel or sand for easy movement)
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Filtration: Moderate to high flow, well-oxygenated water
Tank Setup & Care
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Best in groups of 4+ for natural social behavior
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Ideal for planted tanks, as they help control algae growth
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Hiding spots: Driftwood, rocks, and dense plants provide security
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Tank Mates: Peaceful fish like tetras, rasboras, guppies, otocinclus, and other shrimp
Diet & Feeding
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Primary Diet: Algae (especially hair algae and biofilm)
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Supplemental Feeding: Blanched vegetables (zucchini, spinach), algae wafers, sinking pellets
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Avoid Overfeeding: Too much supplemental food can reduce algae consumption
Breeding
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Difficult in freshwater—larvae require brackish/marine conditions to develop
- Not commonly bred in home aquariums
