1, water temperature: saury is not very strict about water temperature, but the suitable water temperature for growth is about 23℃. Try to ensure that the water temperature is this temperature, so that the swordfish water can grow rapidly.

2. pH value of water: Swordtail fish does not require high pH value of water, and neutral or slightly acidic or alkaline environments are suitable for growth, with a wide range of pH values suitable for growth.

3. Dissolved oxygen in water: Swordfish mainly live in the middle and lower layers of water. When swordfish floats to the upper water layer, it is necessary to observe whether swordfish feeds or breathes in the water layer due to lack of oxygen. Long-term hypoxia will lead to the death of swordfish.

4. Culture method: Sailfish is gentle and can be mixed. Swordfish is gentle and will get along well with other fish species.

Extended data:

High-finned red flag fish is the top carnivore in the depth range, and its food includes other pelagic fish, tuna, loach, flying fish, squid and other cephalopods and crustaceans.

High-finned red flag fish have keen vision to observe their prey, and their "white" muscles provide energy for their attack activities. Swordfish attack their prey with their swords, tearing it to pieces or swallowing it whole.

High-finned red flag fish feed during the day. They disturb the sea water up and down, and many shrimps, fish and squid can't successfully avoid predators because of the change of light intensity, and eventually become the food of swordfish.