Those are salt-water tropical fish not the freshwater fish you see in pet-stores.
Sorta... Depends on what fish you are talking about.
If you have tropical fish in an aquarium you can find a nice selection of food for them at the pet store.
betta are not harmful to people and most tropical fish. However, there are some very common fish that are poisonous. Most of the common plecos with spines can be toxic to tropical fish if they are dumb enough to peck at it. If you feel that another fish you own will get sick from being around your betta, odds are the two can live together happily and healthily. If another pet, like a cat or dog swallowed your betta, I wouldn't worry. I have never heard of pet poisoning from eating tropicals.
Common goldfish or goldfish.
They can but it's best they don't because can get a common fish disease.
Yes and thay are freshwater fish. Most of the guppies at my pet store are orange or sometimes yellow, black and silver.
Tropical fish are harder to look after and cost more. Other than that any type of goldfish is a fantastic pet.
If there are pet shops and hobyists who supply them of course there are. yes no maybe so
They live everywhere warm Mexico, Lower United States, Africa, South America. All over it really just depends on the species.
snake fish lizard bird frog
Yes.The most common fish disease is ick. This most likely happens in pet fish.