科: Characidae
黑大勾灯为脂鲤科鱼类，性情温和，数量过少会神经质，原生分布于南美洲及菲律宾。中上层群游鱼，体色与胆量随群体一起到来。成体约 2.7–4 cm，群体紧密，切忌少于 6 尾，适宜水温 22–28 °C。群要大，光要柔。
Hyphessobrycon megalopterus is a Characidae from South America. In the wild it prefers blackwater streams and flooded forest; in the aquarium it stays gentle, slightly skittish when kept too few. Plan on 2.7–4 cm of adult fish at 22–28 °C. Related profiles: Hyphessobrycon amandae, Hyphessobrycon herbertaxelrodi, Hyphessobrycon eques.
中等难度，稳定水质比高端设备更关键。Gentle, slightly skittish when kept too few，Schools tightly; never keep below 6。
水温控制在 22–28 °C，重点是稳定。Heater for stable tropical warmth。
成体约 2.7–4 cm，属Bottom-dwelling鱼类，建议至少 25 L 缸体。
Mid-water omnivore; colour foods keep the red honest。每天两小餐比一顿大餐更利于状态。
Gentle, slightly skittish when kept too few。推荐混养：Other small peaceful tetras and rasboras — Form a mixed, calm mid-water mass。避免与Single-species isolation — A lone tetra is a stressed tetra同缸。
分布于南美洲：Blackwater streams and flooded forest，Still to gentle current。
无明显跳缸倾向，常规缸盖即可。
Egg-scatterer over fine plants; no parental care。Subtle; females fuller-bodied。