What animal in ancient Greek is the Tigris River named after?

The name of the Tigris River comes from the Greek word Tigris, which itself has nothing to do with the name of an animal. The reason why some people think that the name of the river is related to animals is because they think the word Tigris is closely related to Tiger. Like, in fact there is no direct connection between the two. Tigris and tiger*** use the root words tig and tigr, which literally means a swift river (a river that runs very fast).

The Tigris River originates from the Anatolian Plateau region of Turkey and flows through Turkey, Syria, Iraq, etc. The upper reaches are affected by the westerly winds of the Mediterranean Sea, resulting in heavy precipitation in winter, while the lower reaches flow through a tropical desert climate zone with low precipitation, strong evaporation, and agricultural irrigation water, resulting in small runoff.

Features:

The Tigris River is 1,950 kilometers long from its source to Gurnai, with a drainage area of ??375,000 square kilometers and an annual runoff of nearly 40 billion cubic meters. The river water is mainly supplied by snowmelt in the mountains and spring rains in the upper reaches. The water rises in March every year, and the water level is the highest in May. Because it flows along the foothills, the tributaries along the way have short flows and fast water collection, which often causes the river water to surge and cause flooding, forming a vast and fertile alluvial plain along the coast. It is an important irrigated agricultural area in Iraq.