Fish lying around apathetically

Choose one of the following:

Metal poisoning

  • gasping at the surface or lying on the substrate
  • uncontrolled swimming
  • glazed or eyes not moving
  • loss of appetite

Nitrite poisoning

  • 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