Fish disease diagnostic check-list

ngoodermuth

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I thought maybe it would be helpful to have a "symptoms checklist"; when dealing with an unknown illness, or just to review during quarantine or while browsing your local LFS, as a reminder of what things to keep watch for.

I've compiled two lists, one for physical and one for behavioral symptoms.

Physical Symptoms:
__raised white spots (like grains of salt)
__ flat, larger white or brown spots
__ black spots
__white powdery OR film-like coating
__paleness, washed-out colors
__cloudy or swollen eye(s)
__localized swelling/lumps
__tattered or missing fins
__white/fuzzy growth on fins or body
__patches or spots of discoloration
__ white or red sores or streaks
__white-stringy poop hanging from fish
__foreign, worm-like object attached to body or gills
__visually underweight/malnourished
__bloating, specifically in abdomen

Behavioral Symptoms:
__scratching/flashing on tank, rocks, or decorations
__twitching/ head shaking
__heavy or rapid breathing
__laying on side with^ rapid breathing
__ yawning or mouth "locked" open
__swimming directly into powerhead/flow
__excessive hiding or light sensitivity
__irregular swimming or difficulty swimming
__lethargy
__refusing to eat/suppressed appetite
__"dead" stare (think zombie-fish)
__clamped or prostrated fins
__appearing irritated/pacing the glass continuously
__eating but remaining thin/malnourished

Not all of these things point to a serious issue (lymphocystis is rarely life-threatening, for example)
But, they are good things to be aware of when purchasing or quarantining new fish.

Once you've determined what symptoms are present, I'd suggest referencing @melypr1985 's pictorial guide for diagnosing/treatment links.

Fish Disease Index - Pictorial guide

https://www.reef2reef.com/index.php?threads/Fish-Disease-Index---Pictorial-Guide.285708/

Hope this helps - Happy reefing!
 
Oh, and if I missed something feel free to post in the replies and I'll add it to the original post ;)
 
That's a great list. I can't think of anything to add to it off the top of my head. Great job!
 
Nice job!
 

HOW MUCH DOES A FISH’S FEEDING REQUIREMENTS AFFECT YOUR STOCKING DECISIONS?

  • A lot! - I avoid fish that require frequent or specialized feeding

    Votes: 12 29.3%
  • Quite a bit, but an automatic feeder can change my answer

    Votes: 6 14.6%
  • It depends on whether my nutrient export can handle it

    Votes: 6 14.6%
  • It depends on how badly I want the fish

    Votes: 10 24.4%
  • Not much. I’m willing to adjust my routine

    Votes: 9 22.0%
  • Not at all. Feeding demands don’t limit my stocking choices

    Votes: 7 17.1%
  • I usually learn about the demanding feeding schedule after buying the fish!

    Votes: 2 4.9%
  • I haven’t really considered this before

    Votes: 3 7.3%
  • Something else (see my comments in the thread)

    Votes: 1 2.4%
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