Many fish species have behavioral traits related to reproduction that aim to improve egg conditions and survival of early life stages. Here, we provide the first detailed description of reproductive strategies performed by the rhomboid mojarra, Diapterus rhombeus. We based this description on several mating events, which occurred in mangroves located in Todos os Santos Bay, Brazil. These spawning events occurred at the mangrove fringe in the month of August in 2013 and 2014, which suggests that these spawning events occur predictably in space and time. Two principal behavioral tactics were observed and involved breeding aggregation and a unique nest-clearing behavior. Following these behaviors, many fish exhibited an extreme lethargic state during which they took refuge amidst mangrove roots. Overall, these observations revealed an unexpected and uncommon set of behaviors in an otherwise well-studied species. The present study not only highlights basic gaps in our understanding of estuarine species but also suggests that future investigations are poised to yield exciting and insightful findings.

中文翻译：

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神秘而精致：菱形莫哈拉（Diapterus rhombeus（Cuvier，1829））在巴西红树林栖息地的繁殖行为

许多鱼类具有与繁殖有关的行为特征，旨在改善卵子状况和早期生命的存活。在这里，我们提供了由菱形mojarra，菱形双翅目（Diapterus rhombeus）执行的生殖策略的第一个详细描述。我们基于几种交配事件进行了描述，这些交配事件发生在巴西Todos os Santos湾的红树林中。这些产卵事件发生在2013年和2014年8月的红树林边缘，这表明这些产卵事件可预测地发生在时空上。观察到了两种主要的行为策略，它们涉及繁殖聚集和独特的巢清除行为。遵循这些行为，许多鱼表现出极度的嗜睡状态，在此期间，他们在红树林的根部避难。总体，这些观察结果揭示了在其他方面经过充分研究的物种中出乎意料且罕见的行为。本研究不仅突出了我们对河口物种的了解方面的基本差距，而且还表明未来的研究准备产生令人振奋和有见地的发现。