The cucumber fish generally refers to the Ikuma males, family Hoogwashidae, commonly known as the cucumber fish. Ikuma males are found in the lower reaches of the Heilongjiang and Tumen rivers as well as the middle and lower reaches of the Yalu River. The males usually inhabit the brackish and freshwater areas of estuaries or the lower reaches of large rivers where the water temperature is low and the water quality is clear, preferring to swim along the banks and then swim to the tributaries when the water temperature rises.

When the water temperature reaches 7-10 degrees Celsius in April and May, the fish move upstream from the mouth of the river to the downstream section of the river, looking for places to spawn on the gravel substrate, and the eggs adhere to the gravel. Juvenile fish follow the current downstream into lakes and rivers to live. The males feed mainly on copepods, branchiopods and crustaceans.

Expanded Information:

Growth Characteristics:

1. Annual

Pooled marsh males are annual fishes, and a few live into the second year, Third year. One year up to about 10 centimeters, usually 12 to 15 centimeters. Pool marsh males spawn every year after the freeze, spawning in the lake or reservoir shoreline where there are water plants or gravel on the bottom of the lake.

2, low-temperature

The fish can live normally in the waters below 28 ℃, the optimal temperature of 10 ℃ to 22 ℃, can adapt to 16% of the brackish water, but the water temperature does not exceed 30 ℃, the water pollution is sensitive to the lower tolerance of acidity and alkalinity, acidity and alkalinity is pH 7.0 ~ 9.6, the fish eat branches and horns, copepods, but also eat benthic insects.

3, bait wide

The pond swamp male fish is rich in bait organisms, mainly feeding on zooplankton, but also eating benthic animals, insects, etc. The opening bait of the young fish is rotifers, branchiostomatids, copepod larvae, but also eating single-spore algae.