Although Atherinomorus forskalii is the oldest lessepsian fish species with a widespread distribution range, there have not been any study about its biological and ecological features. Therefore, we aim to understand its effects on coastal ecosystems by determining its feeding ecology and life span. Four hundred sixty-two specimens were obtained with Sabiki rigs from the Turkish coast of the Levantine Sea. The minimum, maximum and mean length values of the samples were determined as 4.5 cm, 12 cm and 8.2 cm ±0.07 respectively. In winter and spring, the species main food item was represented by pelagic gastropods, while copepods in summer and insects in autumn were the main food items. Although A. forskalii prefers small-sized invertebrates, it is observed that they consume juvenile fish larger than one third of their size. Its wide diet preference shows that it is an opportunistic feeder. These findings represent that A. forskalii feeds on native species and also is in food competition since its dietary overlaps. Ages were calculated between I and III, and the second age group was dominant with a ratio of 52.8%. The highest spawning activity took place between April and early July. The hepatosomatic index (HSI) and gonadosomatic index (GSI) values were calculated monthly, and they reached the highest points in May and June, respectively. The results showed that this small fish, which has been deprived of scientific interest until now, has been determined to have a bio-ecological superiority according to its syntopic species. Thus, it is revealed that it has a more negative impact on the coastal ecosystem than expected.

尽管Atherinomorus forskalii是最古老的低等鱼类，分布范围较广，但尚未对其生物学和生态特征进行任何研究。因此，我们旨在通过确定其摄食生态学和寿命来了解其对沿海生态系统的影响。用Sabiki钻机从黎凡特海的土耳其海岸获得了462个标本。样品的最小，最大和平均长度值分别确定为4.5 cm，12 cm和8.2 cm±0.07。在冬季和春季，该物种的主要食物以上层腹足类动物为代表，而夏季的co足类和秋季的昆虫是主要食物。虽然A. forskalii偏爱小型无脊椎动物，据观察，它们食用的幼鱼大于其大小的三分之一。它广泛的饮食偏好表明它是机会饲养者。这些发现代表福寿螺由于其饮食重叠，因此他们以本地物种为食，并且也参与食物竞争。计算出的年龄介于I和III之间，第二年龄组占主导地位，比率为52.8％。最高产卵活动发生在4月至7月初之间。每月计算肝体指数（HSI）和性腺体指数（GSI）值，它们分别在5月和6月达到最高点。结果表明，这种小鱼迄今仍缺乏科学兴趣，根据其同属物种已确定具有生物生态优势。因此，发现它对沿海生态系统的负面影响比预期的要大。