Anyone know the diff bwtn a gambusia and a guppy?

[Cecropia]

I just picked up a couple dozen guppies and have noticed 2 look very different from the others. I believe they may be large female gambusia but before I cull them to keep them from messing with my breeding project I wanted to be sure they weren't large guppies.

Anyone know how to tell the difference?

 

[Lupin]

Do you have pics of those fish? Gambusia is also known as mosquito fish and are slightly more aggressive compared to guppies. I find them less prolific when compared to guppies.

 

[Cichlaholics Anonymous]

Gambusia do get a lot more nippy, but they are pretty versatile when it comes to being kept outdoors and such, being temperate (assuming it is one of the US species).

 

[Dr Joe]

Take note of the head / back of the fish...

http://upload.wikimedia.org/wikipedia/en/8/8c/Gambusia_punctata.png

Gambusia are flat topped to allow them to swim just under the surface tension of the water to catch insects and larva. Guppies have a slight bit of a nose if you will.

And GAmbusia will eat the guppy fry before the other guppies can think about it .

Dr Joe

.

 

[Cecropia]

I have no batteries for my camera Based on that link they're guppies. Those things were at least 2" though. I still have one but the Male RD hit the other one like a freight train.

 

[Druu]

Pics when you can. I find that large gambusia will have fewer fry than guppies that are about 2/3 it's size. Guppy fry also grow more quickly.