チョコレートシュリンプ (Neocaridina davidi)

科: Atyidae

チョコレートシュリンプは2000年代初頭に台湾で固定された Neocaridina davidi の濃い茶色系統で、ブルードリームやブラックローズの祖系統でもあります。体長約2～2.5cm、18～26℃で丈夫。

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

Chocolate Shrimp is the rich brown morph of Neocaridina davidi that Taiwan breeders stabilized in the early 2000s from darker wild-type individuals — the same foundation stock that later produced blue dream, black rose and other dark lines, which is why chocolate tanks occasionally surprise their owner with blue or black offspring. The best chocolates are a deep, warm, fully opaque brown, darker toward the back and tail, reading almost like tiny chestnuts moving over the substrate. As always with this species the care is simple: 2-2.5 cm of shrimp at 18-26 °C, pH anywhere from 6.5 to 8.0, moderate hardness, and a tank matured enough to grow the biofilm it grazes all day. It is an excellent choice for aquarists who find the bright cherry colors gaudy — the chocolate tone suits natural, wood-heavy biotope scapes. Breeding is the standard N. davidi routine: a three-week egg carry in freshwater, miniature hatchlings, no special feeding beyond fine powder in a mature system. Keep it away from other colors and it stays true.

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 dark Neocaridina lines — Blues and blacks descend from chocolate — expect sport offspring
Small peaceful community fish — Adults safe; moss for babies
Otocinclus catfish — Calm tankmate with identical needs
Freshwater snails — Peaceful scavenger companions
混泳しないほうがいい相手: Bright N. davidi colors — Crosses muddy both lines
Copper-based medications — Lethal to all invertebrates
Large-mouthed fish — Active shrimp hunters

繁殖と注意点

雌雄の違い: Females are deeper-bodied with a darker saddle; males smaller, slimmer and lighter brown.
繁殖方法: Standard N. davidi freshwater breeding — the female molts, mates, then fans 20-30 eggs for about three weeks. Because chocolate is a foundation dark line, some offspring emerge blue or black; breeders either cull or separate them.

よくある質問

チョコレートシュリンプは飼育しやすい？

初心者でも安心。Extremely peaceful。Groups of 10 or more。

チョコレートシュリンプの適水温と水質は？

18–26 °C が目安。急変を避け、Stable 18–26 °C; very tolerant of water chemistry。

チョコレートシュリンプの大きさと水槽サイズは？

成魚は 2–2.5 cm。最低 20 L。

チョコレートシュリンプの餌は？

Algae and biofilm grazer; color foods keep hues intense。1日2回の少量給餌が理想的。

チョコレートシュリンプは混泳できる？

可能。Extremely peaceful。おすすめ：Other dark Neocaridina lines — Blues and blacks descend from chocolate — expect sport offspring, Small peaceful community fish — Adults safe; moss for babies, Otocinclus catfish — Calm tankmate with identical needs。Bright N. davidi colors — Crosses muddy both lines, Copper-based medications — Lethal to all invertebrates, Large-mouthed fish — Active shrimp huntersとの混泳は避ける。

チョコレートシュリンプの原産地は？

原産地はSelective-bred form of the East Asian Neocaridina。Any stable freshwater community aquariumに生息。Gentle current。Moderate oxygen。

チョコレートシュリンプの繁殖は？

Standard N. davidi freshwater breeding — the female molts, mates, then fans 20-30 eggs for about three weeks. Because chocolate is a foundation dark line, some offspring emerge blue or black; breeders either cull or separate them.。Females are deeper-bodied with a darker saddle; males smaller, slimmer and lighter brown.。