Isans

Isans are a type of fish belonging to the order Anguilliformes. This order is characterized by elongated, snake-like bodies and a continuous fin that runs along the back, tail, and belly. Isans are commonly referred to as eels. They are found in oceans worldwide, with some species also inhabiting freshwater environments. Their distinctive morphology allows them to navigate through tight spaces and burrows, providing them with protection from predators.

The life cycle of many isan species is complex and often involves a significant migration. Many species begin their lives in the open ocean, where they hatch from eggs. As larvae, they drift with ocean currents, eventually migrating to coastal waters and then into freshwater rivers and streams for their adult lives. After several years, or even decades, they undertake a remarkable journey back to their spawning grounds in the ocean to reproduce.

Isans exhibit a wide range of sizes, from small species measuring only a few centimeters to much larger ones that can exceed two meters in length. Their diet typically consists of small fish, crustaceans, and mollusks, which they locate using their keen sense of smell. Some isan species are known for their ability to produce electricity, which they use for hunting and defense. The classification of isans includes various families and genera, each with unique adaptations and geographical distributions.