ブルードリームシュリンプ (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

Blue Dream Shrimp is the deep-sapphire show morph of Neocaridina davidi, developed in Europe and Taiwan by crossing chocolate-brown lines and selecting the darkest, most velvet-blue offspring over many generations — a pedigree that explains why blue dream is often sold alongside chocolate shrimp and occasionally throws brown juveniles. Premium specimens show an intense, opaque royal blue that holds from head to tail with no transparency. Under the blue coat it is the same bulletproof species: 2-2.5 cm, 18-26 °C, pH 6.5-8.0 and a wide hardness tolerance, grazing algae and biofilm from dawn to dusk. It is one of the most photographed shrimp in the hobby precisely because the color deepens on a dark substrate under full-spectrum light. Breeding matches the rest of the species — freshwater, simple, prolific — but serious breeders cull any brown offspring to keep the line pure. A school of blue dreams cruising a moss-covered log is among the signature images of the modern planted aquarium.

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 — keep blue-only colonies; cull brown throwbacks
• Small peaceful community fish — Adults safe with tiny tetras and rasboras
• Otocinclus catfish — Shares the calm algae-crew niche
• Freshwater snails — Harmless, complementary scavengers

混泳しないほうがいい相手

• Copper-based medications — Lethal to all invertebrates
• Large-mouthed or nippy fish — Will hunt adult shrimp
• Direct strong light without plant cover — Shrimp hide; color display suffers

繁殖と注意点

雌雄の違い

Females are bigger, deeper and carry a darker blue saddle; males are slimmer and slightly lighter royal blue.

繁殖方法

Breeds prolifically in freshwater like every N. davidi morph. The female carries 20-30 eggs for about three weeks and the hatchlings are miniature adults. Because the line descends from chocolate stock, breeders cull brown juveniles so the sapphire line stays pure.

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