Choose one of the following:
Metal poisoning
+0
- gasping at the surface or lying on the substrate
- uncontrolled swimming
- glazed or eyes not moving
- loss of appetite
Nitrite poisoning
+0
- heavy breathing
- rapid gill movement
- hanging around the water surface
Nicotine poisoning
- rigid ventral fins
- erratic swimming and sinking
Osmotic shock
- detachment of the mucous membrane
- bursting of blood cells and other cells
- injuries to the cartilage tissue