1. According to the query of Huinong. Com, the symptom before the death of Hexagonal Arowana was erythema: Erythema or rash appeared on the body of Hexagonal Arowana, and these spots were caused by virus or bacterial infection.

2, rotten skin: Hexagon arowana will have skin ulcers or erosion, which is caused by poor water quality or infection with viruses or bacteria.

3, quiet: I like to hide in the corner of the fish tank, do not eat or drink for a long time, do not defecate, turn my belly, and so on.