Fish Skin Disorders

Symptoms

  

Cause

  

Treatment and Links
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 Your fish are affected with fish lice Fish Behavioral Disorders Flow Chart Treat with  De-Los.
If not, look down the chart further   If not, look down the chart further    
B). Elongated oval objects measuring up to 10mm, stick up out of the skin Fish Behavioral Disorders Flow Chart 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 Treat with  De-Los.
If not, look down the chart further
C). Round reddish enflamed areas, 38mm in diameter, are visible on the skin Fish Behavioral Disorders Flow Chart 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 Treat with De-Los.
If not, look down the chart further
D). Small, dark, knot-like thickened areas, up to 1mm in size appear on the skin Fish Behavioral Disorders Flow Chart Encapsulated metacercariae (larvae) are often found on fish caught in the wild Fish Behavioral Disorders Flow Chart Fish can live to a ripe old age, despite the condition.  No treatment is needed.
If not, look down the chart further
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 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 Use:  a).   Malachite Green -or- Forma-Green.

b).  Treat the fish with Copper Sulfate. -or- Quinine Sulfate
If not, look down the chart further
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 Your fish are affected by the protozoan ciliate Chilodonella Fish Behavioral Disorders Flow Chart Treat your fish with Metronidazole -or- Malachite Green -or- Forma-Green.
If not, look down the chart further
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 Your fish are affected with Brooklynella Hostilis Fish Behavioral Disorders Flow Chart Use:   Malachite Green -or- Forma-Green. -or- Quinine Sulfate
If not, look down the chart further
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 Your fish are affected with Oodinium Fish Behavioral Disorders Flow Chart Use:   Malachite Green -or- Forma-Green. -or- Quinine Sulfate
If not, look down the chart further
I). The skin clouds up in some areas, then comes off, leaving bloody patches Fish Behavioral Disorders Flow Chart Your fish are affected by a heavy Costia infection Fish Behavioral Disorders Flow Chart Use:  Forma-Green -or- Acriflavine Neutral -or- Copper Sulfate.
If not, look down the chart further
J). Whitish translucent areas, not caused by slime form on the skin Fish Behavioral Disorders Flow Chart The fish are probably affected by Sporozoa Fish Behavioral Disorders Flow Chart No suitable treatment known.  Furazolidone Powder helps in rare cases.
If not, look down the chart further
K). The skin, cloudy and inflamed in places, produces a great deal of slime Fish Behavioral Disorders Flow Chart Does the pH satisfy the needs of the fish?  The skin is either infected with Parasites or Bacteria Fish Behavioral Disorders Flow Chart Treat with:   Parinox
If not, look down the chart further   If not, look down the chart further    
    Extreme fluctuations in pH, lead to slime production in the skin.  Fish Behavioral Disorders Flow Chart Adjust the pH by doing a water change.
L). White threads grow out of white and red edged wounds, and form cottony puffs Fish Behavioral Disorders Flow Chart Fungus is infecting the wound Fish Behavioral Disorders Flow Chart Treat with:   Malachite Green -or- Forma-Green -or- Nitrofuracin Green
If not, look down the chart further
M). A whitish film forms around the mouth of one or more of the fish Fish Behavioral Disorders Flow Chart Your fish are affected with Columnaris Fish Behavioral Disorders Flow Chart Treat with:   TMP Sulfa -or- Sulfa 4 TMP -or- Parinox.
If not, look down the chart further
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 Sounds like your fish have a heavy infection of Columnaris.  Fish Behavioral Disorders Flow Chart Treat with:   TMP Sulfa -or- Sulfa 4 TMP -or- Parinox.
If not, look down the chart further
P). Redbordered lesions in the skin.  They often clear up spontaneously Fish Behavioral Disorders Flow Chart The lesions rupture, releasing a liquid.  Your fish are affected by Furunculosis Fish Behavioral Disorders Flow Chart Treat with:
Furazolidone Powder
If not, look down the chart further   If not, look down the chart further    
    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 Treat with:  Kanamycin + Vitamin B-6.  Treat for up to 30 days.  Isolate this fish and treat them for 30 days.
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 A sporozoan cyst or lesion forms in the musculature Fish Behavioral Disorders Flow Chart No suitable treatment known.  Verify by dissecting the fish.
If not, look down the chart further
R). Blisters form along the lateral line.  Often associated with bloat, spread scales and popeyes Fish Behavioral Disorders Flow Chart Your fish are affected by Abdominal Dropsy. Fish Behavioral Disorders Flow Chart 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
S). Light colored spherical prominences which look like eggs but cannot be wiped off, form on the skin Fish Behavioral Disorders Flow Chart Your fish are affected by the Lymphocystis virus Fish Behavioral Disorders Flow Chart No suitable treatment known.
If not, look down the chart further
T). Variously sized blisters which form on the skin pop when stroked, producing a crackling sound Fish Behavioral Disorders Flow Chart Your fish are affected by a swim bladder disease Fish Behavioral Disorders Flow Chart Make sure fish is aerated sufficiently.  Treat with Erythromycin -or- Quinine Sulfate.
If not, look down the chart further
U). One fish, or many fish appear to have red streaking through the body and/or fins Fish Behavioral Disorders Flow Chart Your fish are affected by Bacterial hemmorrhagic septicemia Fish Behavioral Disorders Flow Chart Treat the fish with: Doxycycline -or-Oxytetracycline.
 

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