There are several aspects of gender differences between the little black fish and the lotus leaf fish:
1. Body shape: Male minnows are generally larger, with a body length of 15-20cm, while females are generally smaller, with a body length of 10- 15cm. There are similar differences in the body shape of lotus leaf fish.
2. Color: The body color of the little black fish will be somewhat different under different physiological conditions, but usually the male is brightly colored and has obvious blue-red spots on his body. The female is darker, not so bright. Lotus leaf fish also has similar gender color difference.
3. Parenting behavior: Male herring will show unique parenting behavior in the process of parenting. They will hatch eggs in foam nests to protect and take care of the hatched young fish. However, females do not have this kind of parenting behavior. Lotus leaf fish also have similar parenting behavior.
It should be noted that judging gender differences only from external characteristics is often limited, and sometimes it may be necessary to further observe their behavior and anatomical characteristics to determine. In addition, there will be some differences in gender performance between different individuals. If you want to know the gender difference between the little black fish and the lotus leaf fish more accurately, you'd better refer to more professional materials or consult professionals.