aimsley_87
Fish Fanatic
please, does anyone know what this is and if it is treatable. thanks.

epsom salt epsom salt epsom salt!
he is very very bloated. certainly not eggy as thats a male.
go get yourself some epsom salt. you can find it easily and cheaply at any store that sells over the counter medicines. the ingredient is magnesium sulfate.
use 1 tablespoon/5 gal if treating the tank. one teaspoon/gal if you are using it as a dip/bath in a separate container. (make sure you dissolve the salt first in tankwater before adding). if doing as a dip, can leave in there for up to 30 mins 2X a day. DO NOT FEED HIM FOR 5 DAYS- he will not strave. usually when just a little fat, a day or two fast should suffice. this is a reallly bloated guy. he looks to be in otherwise fine condition. just severely bloated as bettas are prone to. very important not to overfeed these guys. one or two pellets a day is plenty.
how is his behavior? is he interested in food? any red or swelling to his anus? have you seen him poo lately and if so what did it look like (white/stringy/mucousy?). any pinholes in his fins or thinning in the membranes? can he maintain his balance in the water?
just some follow up questions to see if it is just constipation. and yes-it CAN look that severe. but is treatable, although in really severe cases can be lethal if you keep feeding them and they are unable to poo. thats where the epsom salt comes in. helps them go.
keep us posted.
cheers