Methods to distinguish male and female Luohan fish:

1. Distinguishing method of black spots on dorsal fin. 80% of those with no black spots on their dorsal fins are male, and 60% of those with black spots on their dorsal fins are female. However, this method of identification does not apply to flower arhats and small arhats.

2. Dynamic observation and discrimination method (larval fish). Generally, the young male Arhat is more courageous and the younger female Arhat is timid. In the case of insufficient feeding, those who wave their hands gently and do not hide are mostly males, while those who continue to hide at their feet and turn black are usually females. When full, most of the female Arhats will move around, while the male Arhats will shrink to a corner.

3. Static observation and discrimination method (larvae). Observe the small arhat fish. If the abdomen is slightly bulging, it is most likely to be female. Turn over and look at the genitals. If there is a little protrusion, it is a male, and if the abdomen is smooth and not protruding, it is a female.

4. Overall body posture identification method (medium fish). Usually the male is stout and angular. A rounder body is a female.

5. Discrimination method of dorsal fin pedicle bones (medium fish). If the dorsal fin pedicle is thicker or rounder, it is male. If it is thinner or flat, it is female.

6. Method for distinguishing pelvic fin attributes (medium fish). Touch the pelvic fins with your hands. The softer ones are female, and the harder ones are male.