Which fish do best in a saltwater tank?

Answer 1

The easiest to keep fish are generally hardy omnivores; the easiest of these are the clownfish and damsels. Beyond that, easier species include the sixline wrasse, royal gramma, bangaii cardinals, coral beauty angel, large thalassoma wrasses, many of the larger angels, lionfish, groupers, and triggerfish also usually do quite well if provided with ample space.

Answer 2

I know this is almost 10 years old, but I signed up just to make sure that whoever gets here from Google is absolutely clear that you should NEVER put your betta fish in saltwater. They are Freshwater Fish, hailing from rice paddies and rivers in Thailand and other Asian countries.

And even if they were Saltwater Fish, I wouldn't place them with hermit crabs, who would have a field day cutting your betta fish in half the moment the betta tried to pull its "This is my land" shtick and attacked at the hermie.

Answer 3

a betta i think and a hermit crab