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Fish Skin Disorders
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Symptoms
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Cause
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Treatment and Links
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A). With a magnifying glass, you can see red
dots on the fish, or you can see transparent disc shaped
crustaceans |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Your fish are affected with fish lice |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with
De-Los. |
![If not, look down the chart further](images/if_not.gif) |
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![If not, look down the chart further](images/if_not.gif) |
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B). Elongated oval objects measuring up to 10mm,
stick up out of the skin |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
This involves the egg pouches of copepods, e.g.
Lernaea. The anterior portion of the parasite is burrowed
deeper into the skin |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with
De-Los. |
![If not, look down the chart further](images/if_not.gif) |
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C). Round reddish enflamed areas, 38mm in
diameter, are visible on the skin |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
These are sucking marks made by leeches, which
often attack the fish only at night, then hide during the day |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with
De-Los. |
![If not, look down the chart further](images/if_not.gif) |
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D). Small, dark, knot-like thickened areas, up
to 1mm in size appear on the skin |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Encapsulated metacercariae (larvae) are often
found on fish caught in the wild |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Fish can live to a ripe old age, despite the
condition. No treatment is needed. |
![If not, look down the chart further](images/if_not.gif) |
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E). The fish appear to be sprinkled with sand or
grit. The lumps are white, about 0.5 to 1.5mm in size.
The skin comes off in shreds |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
a). In the case of freshwater fish,
they are affected by the protozoan Ichthyophthirius (Ich).
b). Marine fish are affected by Cryptocaryon Irritans |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Use: a).
Malachite Green -or-
Forma-Green. b). Treat the fish with
Copper Sulfate. -or- Quinine Sulfate |
![If not, look down the chart further](images/if_not.gif) |
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F). Clearly delineated, whitish, translucent
areas measuring 1 to 3mm appear on the skin. Often visible
only from a head-on view |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Your fish are affected by the protozoan ciliate
Chilodonella |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat your fish with
Metronidazole -or-
Malachite Green -or-
Forma-Green. |
![If not, look down the chart further](images/if_not.gif) |
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G). In marine fish, heavy slime production,
along with loss of appetite, lethargy and labored breathing.
In the terminal stage, skin slabs come off |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Your fish are affected with Brooklynella
Hostilis |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Use:
Malachite Green -or-
Forma-Green. -or- Quinine Sulfate |
![If not, look down the chart further](images/if_not.gif) |
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H). Tiny, dirty-whitish to yellowish dots up to
0.3mm in size appear on the skin and scale edges |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Your fish are affected with Oodinium |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Use:
Malachite Green -or-
Forma-Green. -or- Quinine Sulfate |
![If not, look down the chart further](images/if_not.gif) |
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I). The skin clouds up in some areas, then comes
off, leaving bloody patches |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Your fish are affected by a heavy Costia
infection |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Use: Forma-Green
-or-
Acriflavine Neutral -or-
Copper Sulfate. |
![If not, look down the chart further](images/if_not.gif) |
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J). Whitish translucent areas, not caused by
slime form on the skin |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
The fish are probably affected by Sporozoa |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
No suitable treatment known.
Furazolidone Powder
helps in rare cases. |
![If not, look down the chart further](images/if_not.gif) |
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K). The skin, cloudy and inflamed in places,
produces a great deal of slime |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Does the pH satisfy the needs of the fish?
The skin is either infected with Parasites or Bacteria |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with:
Parinox |
![If not, look down the chart further](images/if_not.gif) |
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![If not, look down the chart further](images/if_not.gif) |
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Extreme fluctuations in pH, lead to
slime production in the skin. |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Adjust the pH by doing a water
change. |
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L). White threads grow out of white and red
edged wounds, and form cottony puffs |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Fungus is infecting the wound |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with:
Malachite Green
-or-
Forma-Green
-or-
Nitrofuracin Green |
![If not, look down the chart further](images/if_not.gif) |
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M). A whitish film forms around the mouth of one
or more of the fish |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Your fish are affected with Columnaris |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with:
TMP Sulfa -or-
Sulfa 4 TMP -or-
Parinox. |
![If not, look down the chart further](images/if_not.gif) |
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O). The scales in many places are outlined in
white. The skin easily becomes slimy. The fish folds
it's fins and sways |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Sounds like your fish have a heavy infection of
Columnaris. |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with:
TMP Sulfa -or-
Sulfa 4 TMP -or-
Parinox. |
![If not, look down the chart further](images/if_not.gif) |
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P). Redbordered lesions in the skin. They
often clear up spontaneously |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
The lesions rupture, releasing a liquid.
Your fish are affected by Furunculosis |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with:
Furazolidone Powder |
![If not, look down the chart further](images/if_not.gif) |
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![If not, look down the chart further](images/if_not.gif) |
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Lesions rupture, but nothing is released.
Your fish are affected by open Tuberculosis. Warning: This
disease can be spread to humans. Do not put your hands or
arms in the tank if you have cuts or open sores on them. |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with:
Kanamycin + Vitamin B-6. Treat for up to 30 days.
Isolate this fish and treat them for 30 days. |
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Q). A swelling forms in the muscle under the
skin during the course of several weeks and may protrude way out
from the surface of the body. The scales can be lifted
also |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
A sporozoan cyst or lesion forms in the
musculature |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
No suitable treatment known. Verify by
dissecting the fish. |
![If not, look down the chart further](images/if_not.gif) |
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R). Blisters form along the lateral line.
Often associated with bloat, spread scales and popeyes |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Your fish are affected by Abdominal Dropsy. |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with Koi Fix®,
or a combination of
Oxolinic Acid and
Oxytetracycline
in the feed at 1 tsp. per pound each. Use
Forma Green in the water if the fish has ulcerations. |
![If not, look down the chart further](images/if_not.gif) |
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S). Light colored spherical prominences which
look like eggs but cannot be wiped off, form on the skin |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Your fish are affected by the Lymphocystis virus |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
No suitable treatment known. |
![If not, look down the chart further](images/if_not.gif) |
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T). Variously sized blisters which form on the
skin pop when stroked, producing a crackling sound |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Your fish are affected by a swim bladder disease |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Make sure fish is aerated sufficiently.
Treat with Erythromycin -or-
Quinine Sulfate. |
![If not, look down the chart further](images/if_not.gif) |
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U). One fish, or many fish appear to have red
streaking through the body and/or fins |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Your fish are affected by Bacterial hemmorrhagic
septicemia |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat the fish with:
Doxycycline -or-Oxytetracycline. |
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