Fat "male" guppy....... Help

[Lmwcrazy]

Hi there I had 2 new additions to my tank 3 month ago being 2 "male" guppys all colorful and what not. I already have a goldfish, zebra danio, and American flag fish my tank is somewhere in the reagon of 20 gallon it's 2.5ft by 12 inch deep. Just a little back ground there really. My problem is one of my so called males is all fat and developed a black spot at base of fins. Does this mean my male is a female and preggers and if it Is will my others eat them. I didn't really want babies hence the buying of 2 males.
It tells me now though that on my phone I can't add a pic I need to be on pc so will add pic in a min
Thanks for help
Louise x

[Lmwcrazy]

as before here are my pics. also there has been a bit of inter guppy dancing and then a bit of a fight (hence the tails) but other than that there fine there eating well and generally real happy (love there air stone bubbles too) 24103
thanks

[Aeonflame]

You are in the wrong section.

[Trillianne]

That is definitely a male guppy and that isn't pregnancy. The spine from tail to head looks severely curved. Something is wrong, though right now I'm not certain what... possibly bloated and needs to poo? I'd isolate that fish until you can narrow down what the issue there is.

In addition to that issue... if your goldfish is a fancy goldfish, it should be a solo fish in a 20 gallon, if its not a fancy type then a 20 is too small. (Please check the goldfish growth sticky)

Next, your zebra danio is a schooling fish and really should have more.

[Lmwcrazy]

hey yeh i realised i was after sorry.
took some more photos today and took them down to maidenhead aquatics near me and they said she is a rare but beautiful girl that is pregnant. they also said that because my danio is in a social tank he is fine. my felamle guppy is now in her breeding net to protect her from the male as he s apparently trying to kill her (crule fish) she seems happy enough, they told me that she probably dont have much time left befor she pops too. i have been told the american flag fish and 'common' gold fish will eat the babies as well as the female guppy herself so i need to take ehr out as soon as i see that she has had them. now i just need to find me some people who want some guppies as she will apparently have between 4 and 8 litters from one insemination :s thats alot of fish. in my 40 gallon tank. i mesured it last night and used a volume calulator. i never intended to have a breeding fish hence why i piked 2 males so this will be fun. i know what my neice is getting for christmas lol
thanks for our help

[Fishkeeper]

The pet store is wrong, you can do small schools of danios in a community, but you need more than one. For the danio's sake, get at least 3 more!