长鼻虾（犀牛虾） (Caridina gracilirostris)

科: Atyidae

长鼻虾（红鼻虾）是分布于琉球群岛至印度的 Caridina gracilirostris，吻针比头还长、眼部有橙红面罩。成体 3–4 cm，20–26 °C 微碱性水质；草缸里的优秀食藻工。

饲养参数

水温: 22–28 °C
pH: 6.5–7.5
GH 硬度: 5–12 dGH
成体体长: 3–4 cm
最小缸体: 30 L
水层: Middle to bottom — grazing with its long rostrum
饲养难度: 中等
性情: Very peaceful
产地: Southeast Asia — brackish coastal waters

物种概述

Red Nose Shrimp is Caridina gracilirostris, the long-beaked atyid from the Ryukyu Islands of Japan through Taiwan to India, instantly recognizable by a rostrum — the needle-like beak — longer than its head, plus a red-orange mask over the eyes and often a red-tipped tail. Wild populations live in coastal streams where larvae drift to brackish water, yet in the aquarium it adapts well to pure freshwater, making it one of the few 'brackish-origin' shrimp that thrives in a planted community tank. It reaches 3-4 cm, prefers 20-26 °C, mildly alkaline water around pH 7.0-7.8 and moderate hardness, and is a dedicated algae eater that combs filamentous algae and biofilm from leaves and wood without damaging plants. It is active by day, bold for a caridina, and safe with small fish though shrimplets need cover. Breeding occasionally succeeds in freshwater, but a little marine salt in a rearing tank raises larval survival dramatically. Its Japanese name, 'tumitate-ebi', means pile-driving shrimp — a fitting image for that remarkable beak.

原生生境

栖息地: Coastal streams and mangrove edges with plants
水流: Gentle current
溶氧: Moderate oxygen

造景与硬件

底床: Sand with leaf litter
硬景观: Driftwood and dense plants for grazing
水草: Dense plants; may eat very tender shoots

性格食性与混养

群游性: Groups of 5 or more
食性: Algae and biofilm grazer; accepts fine foods
推荐混养: Small peaceful community fish — Adults safe; plant cover for shrimplets
Neocaridina and hardy Caridina — Overlapping chemistry, no serious conflict
Otocinclus catfish — Two algae specialists, one tank
避免混养: Copper-based medications — Lethal to all invertebrates
Very soft acidic setups — Not its preferred water
Large-mouthed fish — Shrimp are prey

繁殖与备注

雌雄差异: Females grow larger and deeper; males stay slim with a proportionally even longer rostrum.
繁殖方式: Occasionally breeds in pure freshwater — the female carries 15-25 eggs that hatch as swimming larvae. Larval survival improves dramatically with a little marine salt (around 5 g/L) in the rearing container, fed on liquid fry food and newly hatched brine shrimp.

常见问题

长鼻虾（犀牛虾）好养吗？

饲养难度：中等。Very peaceful。

长鼻虾（犀牛虾）适合什么水温和水质？

建议水温 22–28 °C，22–28 °C stable range；Stable 22–28 °C。

长鼻虾（犀牛虾）能长多大，需要多大的缸？

成体约 3–4 cm；最小缸体 30 L，并留出活动空间。

长鼻虾（犀牛虾）吃什么？

Algae and biofilm grazer; accepts fine foods。它在Sand with leaf litter上自然觅食，投喂可少量多次。

长鼻虾（犀牛虾）能和其他鱼混养吗？

Very peaceful。推荐混养：Small peaceful community fish — Adults safe; plant cover for shrimplets, Neocaridina and hardy Caridina — Overlapping chemistry, no serious conflict, Otocinclus catfish — Two algae specialists, one tank。避免与Copper-based medications — Lethal to all invertebrates, Very soft acidic setups — Not its preferred water, Large-mouthed fish — Shrimp are prey同缸。

长鼻虾（犀牛虾）产自哪里？

分布于Southeast Asia — brackish coastal waters：Coastal streams and mangrove edges with plants，Gentle current。

长鼻虾（犀牛虾）会跳缸吗？

换水与维护期间建议加盖，防止惊跳。

长鼻虾（犀牛虾）怎么繁殖？

人工环境下：Occasionally breeds in pure freshwater — the female carries 15-25 eggs that hatch as swimming larvae. Larval survival improves dramatically with a little marine salt (around 5 g/L) in the rearing container, fed on liquid fry food and newly hatched brine shrimp.。Females grow larger and deeper; males stay slim with a proportionally even longer rostrum.。