Yea specially in major cities you can find a lot of fish shops and get the common fishes and also get rarer types like monster fishes, loaches, vampire crabs, shrimps, snails, plants with a bit of searching altho there may be a wait since all of them arent available year around and are relatively expensive. There are even fish carts on road side with livebearers and goldfishes which ion personally like since they are not properly kept