If the goldfish is big enough and the guppies small enough, yes the guppies could well be eaten by the goldfish.
Also, guppies should never be with guppies are guppies are tropical fish and goldfish are coldwater fish.
Goldfish eat aquatic plants.
There are a great many plants that goldfish will not eat. Goldfish will not eat plants like trees for example.
goldfish like to dig. so medium size. not too big or too small so they wont eat them
Tadpoles eat microscopic aquatic "plants" called phytoplankton.
Aquatic plants.
piranhas eat aquatic plants.
no
bog cranberries, lemon grass, check fishpondinfo.com for even more edible aquatic plants.
no, goldfish are freshwater fish and coral only grows in saltwater, though they do occasionally eat plants
Yes, goldfish may eat shrimp as they are omnivorous and will consume small aquatic creatures like shrimp. It is important to provide a balanced diet for both goldfish and shrimp if kept together in an aquarium.
aquatic plants
aquatic plants such has aquatic grasses and water lillies ;)