If the fish has a pair of barbels/whiskers around the mouth, its a koi, and if it doesn't, its a goldfish. I can't see its mouth, but i'm leaning more towards a koi since the fish doesn't look very large and if it is a goldfish, its a very silvery one for a juvenile goldfish.
The first important question is, are you planning on keeping this fish? Ideally it should be in a pond- koi grow too large to be kept in aqariums (they can grow to 3-4ft long on average), and non-fancy goldfish grow very large (if yours is a goldfish, it certainly isn't a fancy variety) too, at least 15inches or more long, with a potential to grow up to 2ft long.
Do any of your neighbours have fish ponds that this fish can be rehomed to? If you can find the original owner, that would be even better.
Coldwater fish like koi and goldfish tend not to fair very well in bowls, most are lucky if they live a couple of months in a bowl, because ammonia (from the fishes poop) builds up very quickly in unfiltered bowls and is lethal to fish.
For now, the best thing you can do is to change the water 100% once a day to help prevent ammonia building up too much in the bowl, and to buy some dechlorinator/water conditioner to treat the water with (this stuff neutralises the chlorine and heavy metals found in tap water and so makes the water less stressful for the fish etc). Stress Coat dechlorinator by Api would be the best dechlorinator for your fish right now, as it has the added benefet of helping heal fishes wounds
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Daily fresh new water should also help heal up the fishes wounds, the blood could be septicemia or it could simply be from physical injuries the fish sustained from the cat attack, keep an eye on the fishes condition- if the blood until the skin appears to be spreading across the fishes body or the fish starts to develop ragged fins or get cottony growths or any other odd symptoms etc, this means secondary infections have set into the fishes wounds and you need to inform us imediately so we can inform you on what next best form of action to take is to make the fish better
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While you are deciding what to do with the fish, it would also be good to buy some koi or goldfish pellets for it to eat (pellets are better than flakes for goldfish and koi, they are easier to digest and less messy) and give it a few pellets twice a day for it to eat just to give the fish some energy while it is in your care.
If you do decide to keep the fish, if it turns out to be a koi you will need a large filtered pond to keep it in (at least a 12x6x4ft pond, since koi grow so large), and if its a goldfish you will need a filtered 5-6ft long by 2-3ft wide tank (although a much smaller tank would surfice for now since the fish only appears to be a juvenile fish, i'm guessing its between 3-5inches long? if so a 15-30gallon long tank would be fine for quite a long time intil the tank needs to be upgraded)
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