Why is my betta fish floating and lethargic with holes on its head?

Question

My betta fish has hole like markings on his head and is having trouble swimming...spends a lot of time floating on top. He has still been eating but not as much and missing his food more than anything. I've noticed an improvement in body color and maybe even a little in hole like markings since doing a water change. Also today he ate very well and didnt miss his food. But he still seems lethargic and just floating at the top most of the time so I am wondering if he needs some assistance. Pet's info: Fish | Betta | Male | 1 year and 8 months old

Dr. Massimo Orioles, DVM, Cert AVP, MRCVS · Accepted Answer

Hi and thanks for your request. These lesions could be caused by a bacterial skin infection. Generally speaking you can follow these guidelines: - set up quarantine tank (if he shares the environment with other fish): make sure the tank is well oxygenation and has some plants for hiding; - add 1 teaspoon of aquarium salt per gallon; - add this product https://www.liveaquaria.com/product/4410/?pcatid=4410 as indicated; - leave your fish there and feed him regularly for 3-4 days until you don't see any improvement - If no results at all are seen after 4 days a check up would be needed as more specific tests may be needed to establish a specific diagnosis. Hope this answer was helpful, but please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further. Please find the time to give us a feedback about the consultation as that will be used to improve our service.

Why is my betta fish floating and lethargic with holes on its head?

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