Much has been written on the topic of stress & disease, below is summary to help guide you throughout Aquarium Fish Stress & Disease prevention and identification. Please feel free to send any comments or suggestions to Ask An Expert.

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Major Fish Diseases:

# Image Disease Title Top 3 Symptoms 1. Ammonia Poisoning Red streaking on the fins or body. Purple or red gills. Fins are torn & jagged. 2. Anchor Worms Tiny white-green or red worms in wounds. Frequent rubbing or "flashing". Ulcers may appear. 3. Black Spot Small black speckles on body. Frequent rubbing or "flashing". Small black smudges on fish. 4. Cataracts White or grey "foggy" eyes. Eye looks like it has a slime coat. Tendency to bump into things. 5. Cotton Mouth White "Cotton like" fungus on the mouth. Lethargy and loss of appetite. White spots on mouth, scales, and fins. 6. Curved Spine (Fish TB) Curved or Crooked Spine. Lesions on the body. loss of scales. 7. Dropsy Huge, Fat, Bloated Belly. Lethargy and loss of appetite. Scales almost popping off. 8. Fin Rot Fins turn Jagged or whitish and die back. Fins look like they were ripped off. Fish is not eating. 9. Hole in the Head Hole in the head. Small sore on head. Lethargy and loss of appetite. 10. Ichthyophthirius (white spot or ick) Small white "salt-like" pimples on fins & body. Lethargy and loss of appetite. Frequent rubbing or "flashing". 11. Neon Tetra Disease Restlessness. Whitened areas deep into the fishes' flesh. Spine may become curved. 12. New Tank Syndrome Sudden Death. Cloudy Water. Unexplained Death. 13. Oodinium (velvet) Fine grey-gold to whitish 'dust' on the body. Very rapid gill movement. Scratching or flashing. 14. Parasites (External) Large ugly sores on body. Skin looks grey in patches. Fish swim aimlessly. 15. Planaria (white hairlike worms) Small White Hairlike Worms. Tiny, Wiggley Worms often found in the substrate. 16. Pop Eye One or both eyes protrude from the head in an unusual fashion. 17. Skin / Gill Flukes Fish gasps for air at the water's surface Gills open and close rapidly Gills are covered in mucus 18. Swim Bladder Disease Erratic Swimming Position Loss of equilibrium Fish will be unable to maintain buoyancy 19. Vitamin Deficiencies Scoliosis (Curved Spine) Reduced Growth Anorexia (Lack or Loss of Appetite) View Symptoms per Vitamin

Stress & Disease: Key Points, Tips & Tricks

1. Probably 80-90% of diseases in captive fish can be prevented by avoiding stress.
2. Diseases and pathogens are almost always present in tanks, but a healthy fish's immune system will prevent them from being a problem.
3. Sick or Diseased fish should be isolated whenever possible. You do not want to spread infections among other healthy fish. (IE Hospital Tank)
4. There are literally hundreds of afflictions that can effect the health of your fish. The most common are discussed below.

Things you need to know.

1. Don't buy or add fish to your established tank that have any sort of the following symptoms:
   • Don't buy fish from a tank with alot of dead fish in it. Most likely they have a disease.
   • Any white mucus or Salt-like specks. (20-40% of all pet stores have diseased fish, be careful when buying new ones)
   • Unusual swimming behaviour e.g. tailspin, rapid or jerky movement
   • Signs of injuries to fins and body. e.g. bleeding, ulcers, skin or fin tear
2. Pay attention to the fishes for at least a few minutes a day. Look for any of the following signs:

   Bad signs:

   1. The fish is scratching against tank decorations, rocks or sides of the tank.
   2. There are visible spots, lesions, lumps, or white patches on the fish's body or fins.
   3. The fish's tail or fins appear frayed at the edges or are breaking off, disappeared.
   4. Red streaks near scales.
   5. The fish gasps at the surface of the water.
   6. Gills that are puffy or swollen and the gill tissue is bright red or even a grayish color.
   7. Clamped fins
   8. Fish suddenly becomes really fat.
   9. The fish refuses its usual food for more than 2 days. The fish floats, sinks, whirls, or swims sideways.
   10. A normally active fish is still.
   11. A normally still fish is very active.

Stress & Disease Sources: