Guppies, I think.

[baileystar]

I bought some fish at a pet store and I were told they were very young guppies. I have had them for a few months and they haven't grown or got any colour at all. I was reading that guppies typically start gain colour at 1-2 months old. Any ideas what these could be because I'm not convinced that they are actually guppies.
Sorry for the bad pics. They move around a lot.

 

[Mebbid]

Yep, they are guppies. It's likely you got females as the females are usually completely grey in color with some having a splash of color on their tails.

 

[baileystar]

Oh, ok. Thanks.

 

[Fresh2o]

I was thinking that they might be mosquito fish (Gambusia sp).

 

[jennamckay]

Those are Mosquito fish

 

[Legit Fish]

those are definitely mosquito fish. not technically guppies but they are close relatives

 

[Wiggles24]

I think they are female guppies. Do you know how to tell males from females? If you have a male a close up pic would be pretty easy to tell the difference

 

[Wiggles24]

The only one that looks suspiciously like a mosquito wish to me is the second pic

 

[baileystar]

What are mosquito fish? Is there anything they do I should be watching or do they just kind of swim around and ignore the other fish? To Wiggles24-I don't know how to tell the difference between male and females.

 

[jennamckay]

Nope! Mosquito fish are very much like guppies and can be cared for the same way you would any other fish. They're not aggressive and do well in groups. You can google pictures of them online. You definitely don't have guppies!

 

[Mebbid]

Mosquite fish:

Female Guppy:

Check the dorsal and caudal fins. If there is a row of black spots then they are mosquito fish. If there isn't then they are guppies.

 

[jennamckay]

Mebbid, female mosquito fish also look identical to female guppies. There is very little difference between them but all of his fish have the mosquito fish markings

 

[jennamckay]

Female mosquito fish

 

[jennamckay]

You also could have both!

 

[Fresh2o]

What are mosquito fish? Is there anything they do I should be watching or do they just kind of swim around and ignore the other fish? To Wiggles24-I don't know how to tell the difference between male and females.

Mosquito fish are quite adaptable and this has aided with their introduction into many areas for ...as you might guess, mosquito control. However, despite the benefits they are also non-selective feeders preying on pretty much anything can catch, including native invertebrates and fish (eggs, fry). I've had them in a small pond for the last few years and they have survived Virginia winters except for the last one which was brutal (several days to weeks at a time under ice). Well, at least one has survived. Will be getting more from a local nursery this weekend.
Like other livebearers such as swordtails, platties, and mollies, females are generally larger, more fuller bodied and have a triangular, fan shaped anal fin (single fin on bottom past the "belly" and before the tail). Males have a "pointy" anal fin called a gonapodium which is used for fertilizing the eggs.