my advice - do not get h. comes as your first horse. i purchased four on january 1, two remain. i probably sound like a broken record but let me tell you the condition of the first male who died (less than a week after purchase): atrophied stomach, atrophied liver, protozoa in gills, protozoa in swim bladder, protozoa in heart, protozoa in swim bladder observed ingesting red blood cells, worms in gills, worms in upper gi. the protozoa was confirmed to be uronema. h. comes are my personal favorites however the condition they are coming in is deporable. they are being touted as "tank raised" however, they must be some filty tanks. my own personal opinion is they are pen-raised which i suppose sounds better than wild caught but they are basically coming in with the same diseases and problems that wild caught horses do.
a couple of people have gotten lucky and have reported early success with frozen, i have one trained to frozen and one who still refuses and will only eat live. they have had rounds of fenbendazole, metronidazole, praziquantel, three flair ups of uronema, two resulting in secondary bacterial infections. you don't want to see my medicine chest and what it's taken to keep the two remaining seahorses alive (i've only listed a few of the meds used on them). i have had to tube feed on two separate occasions. it's not fun and will take the joy out of owning these creatures.
i would recommend you search for captive bred seahorses, there are a number of breeders here in the u.s. who can supply you with a quality horse and some great species.