Ok, let me make lil resume for that moment:
Baku - big coralls - so, they are biotic organisms with corall's attributes. They live in symbiosis with Klyroses (or Klyroses live in symbiosis with'em?) -> there are centuries old kindred relationship between Klyros and Baku. Each klyros family/kin has it's own Baku...
...Baldur, i've got to say that in that case Baku acquired very important and serious meaning for all klyros nation.. even for nomads-klyros. Agree? Moving in that direction we can finally receive Cult of Baku or something... We must avoid it.
Also, amongst klyros there is a Legend about that Baku came from Klyros HomeWorld with'em.
I like Baku concept, but it have to be think through.
Why it called Baku? Can you post a transcription?
Gah, so many questions
Comment: I see, but if certain types of Baku "appear" the "cult" would losen up a bit
I'm just telling you about the houses they live in because it's a very interesting piece in my opinion. I am only describing the house, but as it is a living being we need a bit more info then just bricks and sand. Yes, this is very complicated. We might invent several types. Yes, it would be unique but it would also split these creatures up into their community's. This reminds me very much of "clade" where a certain feat of people were given a dna which was in perfect harmony with the biosphere they existed in but they felt sick once they stepped out of it. They called it clade.
Fact:My first intention on naming the Baku was to find a fitting name in latin but I gave it up as we would never have latin in PS, neither would the Klyros, therefore I invented the word "Baku". It stands for the simplicity and the irony that the solution had been waiting for them for eons. Also the words expresses a happiness. The Klyros always express it with joy and therefore it should be expressed that way. I could say the phonetic is Ba-cku.
Even more info 
I'll tell you a brief story of this as I find out things as we go:
Once there were fishermen scouring the landscapes. What they did was never known by others. They travelled across fields, swamps, coasts and mountain ranges in search of something. The fishermen who had come from the caves searched restlessly for their home. Where there were wood, they tried chopping down trees but their weak limbs and few numbers couldn't lift the heavy tree trunks and the work which was successful was immediately replaced with despair when they're proud work rotted away. They walked the plains for many decades, living as a nomadic people never stopping more then a week and they continued, went on, and slowly got used to the life without a home. Though the fishermen had found new strength in their existence they're dream was never forgotten. It was brought through generations, telling stories about great cities made by their ancestors and the surface. So came the day when they reached Flime Beach(Named after one of my own creations, the "Fanged Slime".) To many this was a hostile coast but a new hope scoured through the mass when a Gul fled by and sat on a pearl-like oval, bumping up and down in the water.This was the first encounter with the Baku. With a closer look and underwater inspections the tribe Klyron(the word+ the spanish pronombre ending -n means "Them Klyro"). Their scouts concluded that it wasn't a massive pearl but a living creature with suspicions of being completely hollow. Apparently it had been ripped off the seabed and thrown up to the surface. Where the water ended and the air started it was completely smooth and the normally soft shell had hardened into stone.
This was the beginning of the cooperation between this completely unknown species and the Klyrons'. The fishermen finally got their home in Yliakum and the Baku's hardened shell gave them a defence against their natural enemies(Hmm, i haven't imagined any natural enemies yet, but if you want to proceed with this i'll do my best to make them as threatening as possible[*faints* even more work]) and since then the Klyros have lived in perfect harmony with the sea as thanks for the Baku.(lousy end but it'll due)
So that's the istory of the Baku and how Klyros found them. More will have to be riddled through the libraries once I get the time
I wouldn't say it's a cult, i'm saying it's a joyous culture in harmony with sea and air. The Sea is symbolized by the Baku and why the Klyros are thankful and joyous to the air could be the Gul that showed them the way.
25 May I might have made it a bit to serious in the earlier posts, but I want to make you see is they're a happy people who take care of their houses with a little bit more care, like a man who loves his job. They're thankful to the Baku and therefore they take care of it, or maybe they're thankful to the Sea and the Air.
Anyway! We'll see
I'm going to complete this even and if it sinks*sigh* it sinks, though it's good to know you've tried..
*Observe:
Turn to this post as it has the most truthful explanation between the Klyros' and it's House(lol, sounds funny)*
*Chuckles* This is what you get when you post too much info
