科: Gasteropelecidae
银燕子为胸斧鱼科鱼类，性情温和，数量过少会神经质，原生分布于南美洲。体色是诚实的状态信号：发色差、分散就是在告诉你哪里不对。成体约 3–4.4 cm，群体紧密，切忌少于 6 尾，适宜水温 23–27 °C。群要大，光要柔。
Gasteropelecus sternicla is a Gasteropelecidae from 南美洲. Its colours are honest signalling: pale, scattered fish are telling you something is wrong. It swims in mid-water. Adults reach 3–4.4 cm. Schools tightly; never keep below 6. Keep a proper school, dim the glare, and feed small foods several times a day. Maintain 23–27 °C at pH 6–7. Best suited to a keeper who can match its natural water.