1. The red swordfish reproduces viviparously. When it grows to 7 months old, the female red swordfish and the male red swordfish can be arranged in a ratio of 1:3, and then the female red swordfish will be fertilized before giving birth. Take out the pregnant female swordfish and keep it alone.

2. Red swordfish are large in size and usually give birth every 30 to 50 days. A large female can give birth to more than 200 larvae per litter. The newborn larvae hide in the aquatic plants. on the leaves.

3. The female fish before giving birth has obvious black fetal spots on the anus. The female fish ready to give birth can be fished into a breeding tank. The breeding method is similar to that of guppies. When the larvae grow to 3 months old, the sword tail on the lower edge of the female's caudal fin begins to develop.