The spined loach, a small freshwater fish native to Europe and Asia, is also known by a variety of other names. In some regions, it is referred to as the bracken trout, the rock salmon, or the stone loach. Other synonyms include the danubian spined loach, Turkish spined loach, or simply the spiny loach. These synonyms not only vary based on geography, but also on the physical characteristics of the fish. The spined loach was given its name due to the presence of spines on its back, which can be used as a defense mechanism against predators. Its ability to adapt to different habitats and climate conditions has led to its proliferation and different names.