MSD Manual

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Common Signs of Illness in Fish

Common Signs of Illness in Fish

  • Lethargy

  • Not eating

  • Slow or rapid breathing

  • Loss of color

  • Discoloration or splotchiness

  • Spots

  • Scars

  • Ulcers (open sores)

  • Loss of scales

  • Scales sticking out or standing up

  • Swelling or bloating

  • Weight loss

  • Floating, drifting, or swimming erratically in unusual positions

  • Tumors and cystic growths

  • Puffy and/or fuzzy growths

MSD and the MSD Veterinary Manual

Merck and Co., Inc., Kenilworth, NJ, USA (known as MSD outside the US and Canada) is a global healthcare leader working to help the world be well. From developing new therapies that treat and prevent disease to helping people in need, we are committed to improving health and well-being around the world.  The Manual was first published in 1899 as a service to the community.  The legacy of this great resource continues as the Merck Manual in the US and Canada and the MSD Manual in the remainder of the world. Learn more about our commitment to Global Medical Knowledge.

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