Not if you don't put them together. Amphibians poison the water for fish.
yes, firebelly toads swim in water and they also like land but they are mostly in the water
Because all toads prefer there food to be moving as they eat it! I think it may have something to do with there limited vision and instincts.
Yes - that's perfectly normal behaviour.
Adult guppies eat their own babies, and fish like tuna eat guppies.
most fish will even guppies will eat other guppies it is a risk all ways
Guppies are livebearers. So they don't lay eggs. Male guppies WILL eat their own baby guppies. They will eat any baby guppy they see. It doesn't matter if it's their own or some other guppies'. Male and female guppies eat baby guppies.
No, toads do not eat donuts.
Toads do not eat plants. They are carnivores and eat insects.
Yes IF - you have enough water so the toxins from the toads don't kill them - the fish can survive in the same temperature range as the toads - the fish are going to eat or nip at the toads -the poison will not kill or make the other fish ill at contact such as a healthy Betta fish. Lots of people keep feeder guppies with their toads. Sometimes the toads catch them. But is very rare. Mine didn't catch them.
Guppies aren't large enough to eat frogs.
yes
No, toads don't eat grass.