This depends on what type of guppie.
and...
As long as your guppies and goldfish are relatively the same size, you should be ok. Goldfish seem to be more "docile" than other species. Keep in mind, goldfish can get big depending on your tank size and the number of fish they tank with. I've have had guppies with mollies, goldfish, and platies before and never had a problem. I would keep an eye on everyone though, just to make sure you don't have any tail-nippers. - Darkhorse
Fighting fish only fight with each other generally. I have had one in a tank with guppies before and never had a problem. Answer Male fighting fish can kill male guppy because of his fancy tail.
well no because once my cousin had two fighting fish and put them in the same fish tank the next day one was dead so either put them in different tanks or get one of those fish tanks that have a piece of plastic in the middle.
ACTUALLY, female Bettas can be kept in groups.
Males, usually, should be left alone.
Make sure you are keeping your Betta in an AQUARIUM, and not a bowl, as this is detrimental to their health. Plus, keeping a single male Betta in an aquarium of 5 or 10 gallons lets you add peaceful fish to the tank, like Cardinal Tetras.
Male Betta splendins will fight each other to the death. Just using an aquarium divider isn't enough to keep two males in the same tank. As long as they can see each other, they will still try to attack each other, which can stress and frighten them. Basically, it's like being kept in the same room with your mortal enemy, with only a clear barrier to separate you.
Keeping a male with several females also isn't a very good idea, as the male will chase and harass the females constantly.
So, your only hope of keeping Bettas in groups is to either A) keep a group of three or more females together, B) buy an opaque divider for an aquarium so the males can't see each other, or C) keep a male Betta with other PEACEFUL fish.
Female fighting fish aren't as aggressive as the males, and can be kept together. However, multiple females in the same tank will establish a pecking order, so if you want to keep more than one female it must be carefully planned. Two females isn't a good number because one usually bullies the other; keep at least four or five and make sure they have plenty of space and plenty of places to hide. This arrangement is called a 'sorority tank' and is usually fairly peaceful, although it is occasionally necessary to remove either a bully or a runt and keep her on her own.
In a large community tank with lots of other fish, two females might work out - but you should be prepared to move one of them to another tank if one starts to bully the other.
Absolutely, they do well together, community fish and both are livebearers.
i belive not because the bass fish is big and the guppy fish is small and they might not get along
Well If You Hate Your Fish Than Ya If You Put Two Of Them In The Same Tank They'll Kill Each Other And If You Put One In With Your Goldfish Than Get Ready To Flush Goldie Down The Toilet
No, because the koi fish are about 5x the size of the guppy and the Koi fish will probably eat the guppies.
sometimes but not all the time
I have an Oscar Cichlid in the same tank as mine and I also used to have it with guppy's.
A male guppy can be in the same tank with its own kind and/or with almost all peaceful fish smaller than 5 inchs.
no you can not put a female and male fighting fish in the same tank because they will just kill each other
They can be in a community of other tropical fish of the same size.
no because they will end up killing each other
Fighting fish are territorial and can be very aggressive, they will kill other fish if you put them in the same tank.
The Gravid female will have the dark "gravid spot" in front of her vent. I can however assure you that if there has been a male in the same tank with a female guppy for any reasonable length of time she will be gravid.
Yes, do not go get another guppy unless it is the same gender they reproduce really fast. But fish are better with another fish.
No, because they are fighting fish and one of them will kill the other.
2 or 3
Yes, you can just not have 2 male bettas together.
Not unless you want the guppy thing to be eaten.