Fish's tail bent downwards

[leghair]

Hello,

I noticed one of my Boraras's tail bent downwards recently as if someone go bend it or something?

Does anyone know what could have cause this?

Cheers

[trashedbox]

hmm my guess?

Fish Tuberculosis (Mycobacterium)
S: Fish may lose color and appetite and become hollow-bellied. Fish become lifeless and often crippled—with a bent spine. Fish develop ulcers under the skin and may rupture causing open sores and "pop-eye."
A: This disease is highly infectious and deleterious. Bacteria can remain living in the gravel to infect other fish when they are weakened. Some success has been achieved by treating infected fish with antibiotics (Oxytetracycline and Kanamycin), although often it is best to kill the fish and put it out of its misery. When removing piscine tuberculosis victims, do so with care, as this disease can be transmitted to humans.