You can buy them from most good fish stores; that is, if you're willing to fork out a few hundred pounds for one
No, I'm kidding about the price - still
very expensive, but not that much. I could get one from my online pet store for about $200.
They are wonderful little fish, but even though they are small, they can still consume very small fishes. It's what they're built to do. If you want a non-aggressive, non-piscivorous Moray, I would suggest an
Echidna or
Gymnomuraena Moray. Both of those genera are inexpensive, colourful, and totally gentle if well-fed. That is, unless you have shrimp or small non-hermit crabs in the tank... the flattened teeth of the mentioned genera are built to consume crustaceans. They should, however, ignore Cleaner Shrimp (Morays and Cleaner Shrimp are symbionts in the wild) and Coral-Banded Shrimp (the Coral-Banded is plenty capable of protecting himself), as well as larger Crabs. Most Morays are not the ferocious, dangerous animal their reputation labels them as (unless they are huge, incredibly hungry, or in "packs"; more on this a little later).
Unfortunately, Morays cannot be kept in groups. They pose little danger to each other except in feeding frenzies when they may mistake each other for food. The real danger in a group of Morays is towards the other fish - that's right, Morays will form a "pack" when in a group, much like dogs, greatly increasing their ferocity, voraciousness, and courage. They will ravage the tank, killing everything they can get their large teeth around, even climbing into plastic breeders or isolators to reach prey. I've seen it happen - not a pretty sight....
-Lynden
Formerly "ChestnutMoray55".