This exotic pair, shown above, I named Griffin & Sabine; you can learn more about them on the page about my 10gal seahorse and harlequin shrimp tank. Barbour's seahorses are beautiful and come in colors that range from yellow to red, as shown.
But I don't think I'd recommend them to beginners, especially those who are also brand new to fish, much less marine. Seahorses require special care, which is discussed in greater detail in the link above. They are picky eaters that need to be fed frozen or live foods (do not feed them only brine shrimp, as they need mysis for the correct concentration of long chain fatty acids), but can't take too much circulation, which interferes with their weak swimming, so pollution is sometimes a problem.
They do not usually do well in community tanks with other active fish, because they are often out-competed, unless they are large horses that can be spot fed. Buy captive bred rather than wild caught horses if you get the chance. Though they are a little more expensive, they are less prone to disease and starvation strikes, since wild seahorses rarely accept non-live foods.