Random statements regarding names and some enemy behavior:

Ul'- enemies are weak.
Om'- enemies are stronger.
Ru'- enemies are, as far as I can tell, only seen as spawned mission NMs (Ru'Aern).

You can't see any enemy's name, or target it or affect it in any way, unless it's on the surface. (Meaning you can't tell if that Phuabo is an Ul'Phuabo[/url] or an Om'Phuabo until you aggro it and make it surface.)

-Phuabo enemies are those manta-shark things under the surface that are true sight and aggro you (sight, I think, because you can run along behind them and not have them see you, but if you're in front of them they'll pop up). Haven't fought many of these.

-Hpemde enemies are those red things that can lurk beneath the surface like Phuabos, and pop up to say hi to you (and subsequently just stay up on the surface), but don't attack. They do "aggro" in the sense that they follow you around, but they won't ever hit you, just get in the way of any AOE moves you might've otherwise wanted to use. Eventually, if they're following you, they get bored and go away. Doesn't seem to happen as much, if at all, if there's more than one - perhaps they "link" in the same way, and thus will immediately regain interest if they lose it?

If you *do* decide to fight one, they have an ability they can use to remove any debuffs you put on them. And if they don't have any debuffs to remove, they'll AOE you instead when they get TP. So just fire off a Dia whenever they remove their debuffs, and you're safe from AOEs as far as I can tell.

-Aern enemies are Al'Taieu's version of beastmen. They have the usual job-specific selections of abilities. The WHMs can even reraise themselves (which came as a big surprise to us the first time), and the DRGs summon a "Wynav". They're the blue things with what looks almost like wings that float around on the surface. They don't aggro, but they do link. It's hard to tell what job they are before they start using specials on you, except by looking at their weapons.

The Ru'Aerns you have to spawn and fight for your first mission after getting to Al'Taieu, have 2-hours as well.

-Xzomit enemies are those floating squid things that are constantly moving, with a big one in front and two smaller ones behind it. They seem to link by sight. Pulling them is a pain because they never stand still. Like the other surface enemies, they don't aggro.

-Yovra enemies are those UFO jellyfish NMs that drop down from the sky on top of you if you're not actively looking up to keep an eye out for them. In other words, they (true sight) aggro if you walk below them. Probably sound - i.e. proximity, even if they are way up in the air - rather than directional sight aggro. They lose interest if you run away long enough though. Which is good because it takes forever to kill one.

They have insane auto-regen (can't be dispelled), a ton of HP (especially the Om'Yovra but even the Ul'Yovra), en-paralyze, and a variety of interesting specials. Including AOE charm, AOE gravity, and AOE remove-all-equipment (which is a riot).

Note that if you Sleepga the charmed people, it won't hit the Yovra, and if you Sleepga the Yovra, it won't hit the charmed people. (Same for Horde Lullaby.) Keep that in mind when targeting.

Despite being NMs by checking them, they're relatively plentiful (not all over the place like the rest of them, but you don't have to wait a few hours before anyone sees so much as one Yovra).

All of these enemy types (and yes, that's everything you'll see there) drop their respective EX organ, and can drop crystal clusters. All of them (even the Yovras) are sleepable with both Lullaby and Sleep, but they're light-resistant. (They also tend to resist Thunder nukes if I recall. Perhaps they resist fire and wind as well, haven't checked.) So anything stronger than EP-DC will probably need a Light Threnody before Lullaby will land reliably. Sleep never had any problems landing, except for the mage in question being interrupted by being hit.