Poop-Head, I think you mean Ghost Pipefish (yes, they are in the same family as regular pipefish and seahorses, which is the Syngnathidae). And yes, they are definitely VERY cool. They are all in the genus Solenostomus. They are also very fragile, but if kept either by themselves or with peaceful tankmates, such as mandarinfish, small gobies, some of the deep sea pygmy angels, shrimpfish, and other syngnathids (i.e.-seahorses and pipefishes), and have their tank hooked up to a fuge so that they can be fed the copious amounts of brine shrimp that they need to survive, they can be kept successfully. Problem is, they're not extremely common in the wild, and from what I understand, they don't ship the best. But I'm with you in that I'd love to try my hand at them someday. BTW...check out sea dragons, too. They're just as cool and bizarre as the Ghost Pipes. Ponie Girl, it typically depends on the seahorses being kept whether or not a fuge is needed, but fuges DEFINITELY help in keeping ANY type of syngnathid, seahorses included, because copious amounts of what they feed on can be pumped into their display tank with minimal disturbance, and without having to pretty darn much handfeed them with a turkey baster no fewer than 3 or 4 times a day. Fuges are a lifesaver in instances such as these, and for something like the larger seahorses (your mustangs definitely qualify), fuges are nearly a necessity because of how much they can eat and the near-constant foraging they have to undergo to meet the energy needs placed on them by their size.
Brad