Hi everyone
Hope this helps :- SKELETAL DEFORMITIES.
Distortion of the vertical column is often the most obvious skeletal deformity, as this can affect the fish's general body shape.
The fish'd backbone may appear bent, laterally ( in the horizontal plane)=scoliosis and vertically =lordosis.
Skeletal deformities may arise from collision, infectious deceases,nutritional deficiencies, or be a result of a genetic or developmental adnormality.
In the case of a highly active species, the fish may have collided at speed with the aquarium glass/decor or with the aquarium cover and caused some spinal injury.
There are of cause infectious diseases, certain systemic infections, notably MYCOBACTERIOSIS can damage the skeletal tissues. Resulting in distorted vertebrae.
Nutritional deficiencies: Deficiency in dietary phosphorus, calcium or vitamin C may lead to skeletal deformities in fish.
Genetic and development disorders: Skeletal deformities may be the result of genetic abnormalities, perhaps due to inbreeding or they may have occurred during the early development of the fish.
PREVENTION AND TREATMENT.
The careful selection of good breeding stock and the provision of suitable water conditions during rearing should help prevent genetic and developmental skeletal deformities from occurring.
Dietary-linked deformities are unlikely to occur if a well balanced and varied diet is given. Skeletal damage through collision injury is less easy to prevent, other than by providing stress free conditions which will reduce the likelihood of a fish taking flight and darting through the water.
Once developed, skeletal deformities cannot be rectified. EUTHANASIA may be necessary.
Deformed fish should not be purchased. Given the probable suffering experienced by cultivated deformities such as Blood red parrots and Balloon mollies and many fancy goldfish.
HTH, I think i covered everything.
This info was taken from A-Z of tropical fish diseases and Health problems and was writen by Burges, bailey and exell.