I do not believe so. I have never heard of or seen this occurring naturally.
No, this is not possible, guppies can only mate with other guppies.
Actually, yes. The offspring are all sterile males. So you can't get any further fish from the mating.
Do not be missled. Guppies and Mollies are totally different species and can not breed together. To say that a cross between a Guppy and a Molly is possible is like saying that a Human can be crossed with a baboon. It CAN NOT BE DONE naturally.
Melchisedec and Christino (the last contributor) are spot on. As with many living things,and in many of the sciences the 'taxonomists' are continuously re-defining and re-naming many genera and species. I know of some trees that have had their species changed 4 or 5 times over the last 10 years or so. I am quite sure that the new species name for the old 'Lebistes reticulatus' ie Guppy which is now 'Poecilia reticulata' may well be changed again and the old name for molly which is now 'Poecilia' was 'Molenisia sp. may also be changed again. It is quite obvious from simple observation that the two fish are not of the same species. Some taxonomists obviously need to get away from the microscope and use their eyes (observe) and use common sense occasionally.
It might want to mate with it.
In all probability at least one of them is trying to mate.
No.
There is no such thing as an expectant mother Tetra. Tetras are egg layers and can not get pregnant so they do not have babies.
Here are some examples for freshwater fish: Cutthroat Roanoke Smallmouth
Nope, that can not happen.
They can be in a community of other tropical fish of the same size.
He wants to mate with the female. That is a guppy's normal mating behavior.
Yes, chances are most guppies in your country are related distantly.
You mean, how do they reproduce? They mate. And they don't lay eggs, they're livebearers.
There's the Narwhal Needlefish Nautilus Northern Pike Northern Seahorse Norway Lobster Neon Blue Guppy Neon Red Guppy Neon Blue Hermit Crab Nurse Shark Nettlefish Neon Tetra Nerka
Guppies can mate in a community tank of tropical fish around their size. Be sure to add lots of live plants!