Biotin deficiency (Vit H)


Spasms - convulsions
Fish appears to be having a fit, jerking and twisting abnormally.
Dark body colouration
The colours of the fish are darkened beyond their normal shade.
Growth poor
Parasite infested fish show very slow or no growth, as parasite is taking the food.
Muscular atrophy
Muscles of fish show evident wasting away.
Skin lesions
Lots of small lesions appear on the skin


Lack of Biotin in diet.


Outlook good if detected in time.


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In modern Aquaculture and Aquarium Keeping, this condition should not arise. If suspected get a full Bioassay of your feed before taking any remedial action. 


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