Hypleurochilus fissicornis is a resident species of the intertidal and subtidal zones of Mar del Plata, Argentina. The specific reproductive biology was studied by means of both microscopic and macroscopic analyses. A total of 212 males and 223 females were analysed. Specimens were dissected and their gonads and livers were removed. The gonadosomatic and hepatosomatic indexes and the condition factor were calculated on a monthly basis. Hypleurochilus fissicornis breeds in rocky intertidal areas, and exhibits low fecundity with benthic eggs and parental care. Size at first maturity (L50) was estimated at 53.66 and 55.83 mm total length for females and males, respectively. The spawning season takes place between December and April.

中文翻译：

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Hypleurochilus fissicornis (Quoy & Gaimard, 1824) (Pisces: Blenniidae) 在西南大西洋岩石潮间带的繁殖变量

凤尾鱼是阿根廷马德普拉塔潮间带和潮下带的常驻物种。通过微观和宏观分析研究了特定的生殖生物学。共分析了 212 名男性和 223 名女性。解剖标本并取出其性腺和肝脏。每月计算性腺体和肝体指标和条件因子。凤尾鱼在岩石潮间带繁殖，对底栖卵和父母照顾表现出低繁殖力。第一次成熟时的大小 (L50) 估计雌性和雄性的总长度分别为 53.66 和 55.83 毫米。产卵季节发生在 12 月至 4 月之间。