Caridina multidentata

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Amano Shrimp
Amano Shrimp
Species Caridina multidentata
Difficulty Moderate
Min. Tank Size 18.927 liters
18,927.059 mL

5 US Gallons (18.9L)

Size 5.08 cm

1.5-2 " (3.8-5.1cm)

pH 6.0 - 7.5
Temp. 290.928 K
17.778 °C
523.67 °R

300.372 K
27.222 °C
540.67 °R64 -81 °F (17.8-27.2°C)

Water Hardness

6-10

Stocking Ratio 1:1 M:F
Availability Uncommon
Diet

Omnivore
Flake Foods
Other (See article)

Life Span

1-3 years


Contents

Alternative names

Amano Shrimp, Algae-eating Shrimp, Yamato Shrimp, Japonica Shrimp, Algae Shrimp, Japanese Swamp Shrimp, Japanese Marsh Shrimp, Amamoto Shrimp, Yamato Numaebi

Scientific Names

Caridina japonica was its senior synonym until September 2006 [1].

Sexing

The male has a row of distinct dots along its lower side.
The female has this row as more of a broken line, and is also slightly bigger. See picture below.

Breeding

To breed these shrimp, salt water conditions are required for their fry as well as special feeding. Breeding of this species is considered fairly difficult.
See external link below.

Environment Specifics

The Amano Shrimp prefers planted aquariums. Slightly soft (GH 6-10dh) water is preferred (if the GH is too low they can't make their carapace). They are extremely sensitive to ammonia, nitrite and an excess of nitrate, and as such should only be added to a cycled tank. A small level of Iodine in the water is probably recommend to help them molt. This can be supplied via normal fish food or via typical health food shop Kelp tablets.
A tank of at least 10-19L (2.6-5 US G.) is considered the minimum and you can stock around one Shrimp per 3-5L (0.8-1.3 US G.) in that.[2]

Behaviour

These shrimp are diligent consumers of algae, and are one of the few species available which will consume black brush algae, a particularly troublesome form of red algae. It should be noted, however, that they generally prefer fish food to algae, and will only resort to the latter if the former is unavailable. Also, due to their small size, a large number of them may have to be employed to make a serious impact.
  • If you see your shrimps at the surface a lot then this is probably due to lack of oxygen, nitrite poison or high nitrate levels.
Approximately once a month (depending on diet, age, and environmental factors), the shrimp will moult. During this time, the shrimp will seek out a place to hide while its new shell hardens, for safety reasons. Many inexperienced aquarists jump to conclusions, assuming their unseen shrimp to have been eaten; these fears are short lived however, as they usually reappear after a few days.

Pictures

Amano shrimp in an Aquarium

Young Amano shrimp in an Aquarium

Amano shrimp In an Aquarium

Mature female Amano shrimp

Mature shrimp

Closeup of the female Amano shrimp

Closeup of two Male Amano shrimps. Note markings on tail

Closeup of a mature female Amano shrimp

Closeup of a female in berry

Closeup of male and female at play about 10 days prior to female in berry, note that she bucked two other males off consistently and let this one play.

Amano Shrimp with Algae

Video



References

  1. ↑ PFK Website News Item Matt Clarke, 21/9/2006
  2. ↑ PFK, Issue7/July 2008, Page 22, George Farmer

External links

Mailing lists and forums for further discussion on these shrimps can be found:

Commercial Sellers

Facts about Caridina multidentata
Availability Uncommon
Common name Amano Shrimp , Amano Shrimp, Algae-eating Shrimp, Yamato Shrimp, Japonica Shrimp, Algae Shrimp, Japanese Swamp Shrimp, Japanese Marsh Shrimp, Amamoto Shrimp, and Yamato Numaebi
Diet Omnivore  +
Difficulty Moderate
Foods Flake Food  +, and Other Foods  +
Maximum Size 2 in (5.08 cm)  +
Maximum age 3  +
Maximum hardness 10  +
Maximum pH 7.5  +
Maximum temperature 300.372 K (27.222 °C, 81 °F, 540.67 °R)  +
Minimum Tank Size 5 US Gallon (18.927 liters, 18,927.059 mL)  +
Minimum hardness 6  +
Minimum pH 6  +
Minimum temperature 290.928 K (17.778 °C, 64 °F, 523.67 °R)  +
Scientific name Caridina multidentata
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