リリーシュリンプ (Neocaridina davidi)

飼育条件

水温

18–26 °C

pH

6.5–8

GH硬度

6–15 dGH

成魚の体長

2–2.5 cm

最小水槽

20 L

泳ぐ水層

Bottom — grazing plants and hardscape

飼育難度

簡単

性格

Extremely peaceful

種の概要

Rili Shrimp is the piebald pattern morph of Neocaridina davidi created in Japan and Taiwan by selecting cherry shrimp with transparent mid-sections until the color broke into clean patches — the name comes from the Japanese painting technique 'rili-zu', a mottled ink style. A classic red rili wears solid cherry red on the head and tail with a glass-clear band between, so the internal organs show as a dark line along the back; blue, orange and yellow rilis follow the same broken pattern. Beneath the fancy coat it is the indestructible N. davidi: 2-2.5 cm, 18-26 °C, broad water chemistry tolerance, and a relentless appetite for algae. In the aquarium rilis are among the most entertaining neocaridinas — the transparent window makes their feeding and egg fanning visible in a way solid-color shrimp never allow. They breed freely in freshwater, though rili patterning throws a range of grades from almost-clear to nearly-solid, and dedicated breeders select the crisp high-contrast patches each generation. Keep one pattern per tank and they will color up within months.

原生環境

生息地

Any stable freshwater community aquarium

水流

Gentle current

溶存酸素

Moderate oxygen

レイアウトと設備

底床

Fine inert gravel or shrimp-safe sand

流木・石組

Java moss and driftwood for grazing

水草

Dense moss and fine-leaf plants

性格・餌・混泳

群泳性

Groups of 10 or more

餌

Algae and biofilm grazer; color foods keep hues intense

おすすめの混泳相手

• Other Neocaridina davidi morphs — Interbreed; rili pattern degrades fastest in mixed tanks
• Small rasboras and tetras — Adults safe; dense moss for shrimplets
• Otocinclus catfish — Peaceful algae partner
• Freshwater snails — No conflicts

混泳しないほうがいい相手

• Copper-based medications — Lethal to all invertebrates
• Other color/pattern N. davidi — Mixing erodes the crisp piebald pattern
• Predatory fish — Shrimp are prey

繁殖と注意点

雌雄の違い

Females are larger and deeper-bodied, the transparent window making the green egg mass easy to watch; males slimmer with sharper red patches.

繁殖方法

Breeds freely in freshwater like the species. Clutches of 20-30 eggs hatch after ~3 weeks as miniature adults; expect a spread of rili grades in each batch, and select high-contrast juveniles if you want show-quality lines.

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