There are several species of fish that have orange and or red fins depending on the time of year and their condition/health.
all fish have fins
Most. There are very few fish that have no scales and all fish have fins.
All fish have gills and all fish have fins.
Well all fish have gills, fins, are coldblooded, and have a backbone.
Yes, all fish do have fins to help them swim. But some have very small fins, and some marine animals such as snakes and eels may not have true fins. Most fish have prominent fins at the end of their tails to guide them, as well as dorsal fins on their backs.
Yes, all Rasboras are freshwater fish. They are a good beginner's fish for a new aquarium.
Technically no, but the sides of their body act like fins.
All freshwater fish don't mind alage at all. Many freshwater fish eat alage like plecos, and loaches. Which you can get at almost any pet store.
all of them
No.
A saltwater fish tank can be half freshwater and all of the saltwater fish will live but not for very long.
EEls do not have fins (most of them)