which specie of marine fish is the easiest to keep/maintain?

Hi! A 10 gallon tank is pretty small for a salt-water aquarium... BUT... When I was a child I had a tiny 5 gallon fish tank. I really wanted some interesting pets, and since my parents wouldn't let me get anything other than fish I decided to try sea horses! There are some tiny breeds of seahorses, and I figure if I could keep them in a 5 gallon tank (with no filter, just an air-stone!) at 10 years old they must be pretty hardy! Back then you could get them through the mail. I ordered a "kit" which included a female, a male and a pregnant male! They also included a sea snail. It was SO NEAT to watch the male seahorse give birth. They were easy to feed too. They ate newly hatched brine shrimp. I would sprinkle brine shrimp eggs on the surface of the tank and within a day their fresh food had hatched! Anyway, I would suggest seahorses since you have such a small tank. They are very interesting and adorable :) Good luck!!

I think it is very hard to keep a marine aquarium. It needs a lot of work and time to maintain. I suggest you consider having a Freshwater tank instead. You can take care of some beautiful cichlids. they are easy to keep and a cichlid tank is the closest to having a marine aquarium. search it on the web. I have been keeping cichlids for 3 months now and they are a joy keeping. there are lots of species of cichlids you can choose from. some very colorful and some very easy to keep and breed.