If you find this tool usefull, please, consider supporting it by small donation: paypal.me/artemkuchin This web-tool allows your to perform quick interactive diagnostics of your aquarium or pond fish mostly based one on how they look like and how they behave. In the full description of a disease you can find additional information about it as well as information on treatment and preventing of it. You can browse the list of fish diseases Please, specify all symptom (external body conditions and specific behaviour) which you are observing on your fish. There must be no less than 2 symptoms. If unsure whether symptom is present - mark it! You should know, that diagnostics is made only merely on whether symptom is present or absent for each disease. Each symptom for each disease in the databse has its weight and diagnostics is made using these weights. Determination of correct weights is the most important point. We have collected a lot of data through many books and sites to determine the weights. However, this data never be perfect, so, when you perfom diagnostics be sceptical and analyze what you read in full desriptions of diseases. As you understand, we do not take any responsibility on what you would do with you fish in any case. Use this tool solely on your own risk. But we think it is better thank nothing and does help in many cases. Exterior (body conditions): Ashy coloring

Big tumour in the area of throat



Black discoloration of the iris

Black spots

Blindness

Bloat

Bloated front part of belly



Bloody spots turning into ulcers with white edge and red center



Bloody-redish wounds

Blue-grayish slime coating

Blue-white opacification of fin edges

Brightening (lighting) of body colors

Bump

Constantly open mouth

Cotton wool coating



Darkening of body color (Black discoloration)

Darkening of gill filaments

Decay and fading of tail fin

Degeneration of gonads

Degradation of gills

Development of gonads

Discoloration

Entire body covered whith gray coating

Fins are spread apart

Fins stick together

Fish growth slows down

Fish stop growing

Fish swim near the surface, often holding the dorsal fin above the water

Flat black overgrowth on skin and fins

Fraying of fins

Gill covers are bent

Granular structure of the iris (Pterophyllum scalare only)

Gray stripes on gills

Grayish-whitish tumour excrescence 1-5 mm on fins, gill covers and on the edge of the mouth

Heavy slime production

Hemorrhage in eyes

Hemorrhages around the nostrils and in gill covers

Hemorrhages on the body and fins



Inflamed anus

Inflammation of eyes

Leukoma (spot on an eye)

Loss of eyes

Mosaic gills coloring

Opacification of the cornea (keratoleukoma, nebula)

Overall body thinness

Paralysis of dorsal and pictorial fins

Popped eyes

Protruding operculi (gill covers)

Ragged or frayed dorsal fin

Rectum and bladder are partially fallen out

Red stripes on gills

Round and oval pale or pink bumps between 5 and 10 mm in size



Scale raising

Scale shedding

Scoliosis (bent spine)



Separate slightly red areas on the body

Separation of fin rays

Shiny stripe of NEON lost color on some parts of the body

Skin became transparent because of very enlarged belly

Skin became whitish in the area of dorsal fin and tail stem

Skin detaching

Skin thickening

Slime comes out of gills

Small dark spots

Swelled gill filaments

Tail fin is down

Thin white thread on the ROE

Tumours near tail, ventral and pectorial fins

Ulcers

Underdevelopped fins

Underdevelopped gill covers

Uneven (rough) gill edges

Velvety coating flour like coating



Very small white and gray nodules

Very small whitish-yellowish spots

Very thin white threads perpendicular to a body



Warts tear apart when you try to separate them

White and gray nodules (spots)



White gills

White spots small white bumps



White ulcers near the base of disintegrated fins



Whitish bursting/opening spots and tumours

Whitish spots



Behaviour "Cough"

Clamped fins

Convulsions

Dead fish stay with open mouth

Disequilibrium (dizzyness)

Excited behaviour

Fish involuntarily rise to the surface

Fish are afraid of light (photophobia)

Fish are easy to catch by hands

Fish are inert

Fish breathair from the surface of the water (swalling air)

Fish do not react to anything

Fish do not take food very well (low appetite)

Fish do quick spinning movements

Fish do swinging movements

Fish feed well, but are skinny

Fish go to vertical position

Fish hang near the surface

Fish hang near the surface with heads up

Fish hide in secluded places

Fish itch (fish scratch on the rocks and other objects)

Fish jump out of the water

Fish lie at the bottom of the tank with mouths wide open and spread their fins and gill covers

Fish lie at the bottom on one side

Fish lie on the gravel

Fish move in violent rushes

Fish stay near the surface or air stream, but not take air

Fish stays in corners of a tank tilting body down

Fish stop feeding

Fish swim belly-up (upside down)

Fish swing on their side

Gill covers are tightly closed after death

Gregarious fish stay separated one by one

High sensitivity to mechanical irritants

Laboured breathing

Paralysis

Rapid breathing

Trembling fins

Other symptoms Bloody faeces

Gill arches displacement

Rotten egg smell

Slimy faeces

Threadlike faeces

Water has a milky appearance

White, white-yellow, white-brown worm up to 5 mm in length seen on gravel or on the glass when light is suddenly turned on

Lab analysis (microscopic observation) Symptoms listed below is impossible to obtain without special devices such as microscope. If you don't have such equipment do not mark any of the symptoms below. A microorganism (bacteria) is seen with 400x magnification



A protoazan Trichodina which uses a ring of hooks to hold onto the fish



An autopsy of a severely affected fish reveals a mass of yellowish-brown nodules, the size of a millet seed, which can be seen with the naked eye and which cover the surface of the viscera. Microscopic examination will reveal cysts in the affected organ

An autopsy of relatively big fish shows blood froth coming from blood vessels

An autopsy reveals inflammation of the intestines

An autopsy reveals numerous nodules in the spleen, liver, kidney, heart, intestines, gills, muscles, sex glands, skin, eyes, and the skeleton. The nodules have a curdled consistency and are of brown or white color



An autopsy reveals that mucous membranes are inflamed, with a large number of bleeding sports

An autopsy reveals viscera covered in fat and blood lighter in color



An autopsy reveals white nodules on the affected organs (connective and muscular tissues, the walls of the intestine, kidneys, liver, gills, genitals, and cornea). The nodules are filled with egg-shaped cysts of Gluges, 3.5-5.9 micrometers

Ciliated parasite is seen on the skin and gills of sea water fish Brooklynella hostilis



Degeneration of liver

Flagellates 8-15 micrometers large of different form which depends on the relative position to the observer. There are two flagella on the front part of the organism Ichthyobodo necatrix Costia necatrix



Liver injury

Microscopic examination of gill filaments reveals fungal hyphae and spores. Fungal hyphae are tree-like, 26—60 microns in width. Hyphae are nonseptate, which is an important diagnostic feature, they contain gray spores, 8—13 micron in diameter

Microscopic examination of gills and gill arches’ slime shows parasites Dactylogyrus



Microscopic examination of skin and fins scrape shows parasites



Microscopic examination of skin and gill slime shows the parasites



Microscopic examination of skin and gills scrape shows rotating ciliated infusoria



Microscopic examination of the intestines and gallbladder show the Hexamita (Octomitus) truttae flagellar parasites. They are teardrop-shaped, 10-12 micrometers long, with 4 pair of flagella in front of it and 1 behind.

Microscopic examination shows lymphocystic cells resembling eggs of tapeworms and crustaceans. Lymphocysts can be observed on the walls of the stomach, spleen or ovaries as well as in the gill cavity, between gill filaments



Microscopic examination shows bacteria



Motile protozoa are observed with a magnifying glass



Protozoan Tetrahymena



Sucking parasite Gyrodactylus with elongated body (0.2 – 0.8 mm) and has at its posterior portion a sucker with two central large hooks, surrounded by sixteen smaller hooks for attaching to a host



There are attached parasitic crustaceans on the fish body



There are white-gray nodules in the muscle tissue. The spores of parasite are seen via microscope



Through the magnifying glass it can be observed that scales have small goldish bumps on their edges, which can turn into continuous coating in bad cases



Whitish worm several millimeters in length is seen with naked eye



With magnification of 40x a ciliate protozoan can be seen under the skin and epithelium outgrowth on the mucous tissue





Data field below are not required, but it would be nice of you to fill them in. Any remark: Name: E-mail:

If you find this tool usefull, please, consider supporting it by small donation: paypal.me/artemkuchin