In Japan, the catfish is also known as the catfish. This is because the fish has the ability to "take over the territory". In the wild, it occupies an area of about one square meter, and its range of movement is only 2-3 meters. The fragrant fish often inhabits in the shallow, thin, low temperature Tonghai streams, scraping and eating moss on the rocks for a living. The fragrant fish is a migratory fish at the mouth of the sea, living in the streams connected to the sea, to cling to the benthic algae on the rocks for food. In late fall, the fish gather in the gravel shallows to spawn. After spawning, they are weak and mostly die. Life is extremely short, only one year, so it is also known as the "year fish".

Young fish

The following spring, the young fish from the sea into the stream life, in order to ask for food, they swam in groups against the stream upstream, even if they encountered rapids, floods, or other obstacles, but also defy, break through the resistance, and courageously forward. The journey can be up to 20 kilometers in a day. From February to May every year, when the water temperature of the river gradually rises to 10-15 degrees Celsius, which is close to the temperature of seawater, the juvenile fish (2-3 centimeters in length) that overwintered in the sea enter the estuary and go upstream. Juvenile fish grow and develop in the river, with the development of gonads, and migrate to the lower reaches of the river, spawning in September-November With the growth and development of the young fish and the continued decline in water temperature, the juvenile fish enter the sea to overwinter.