Just logged out of game & I have a couple of observations before bed. Haven't got time to read the 50 pages (!!!!) posted since I last dipped into the thread about 4 hours ago so apologies if these are repeat of other posts.
The barnacles produce meta-alloys from the ripe "bud" on each of the two largest spikes. One of the smaller spikes produces Germanium & Yttrium, others appear to be more common materials - iron, sulphur, nickel, phosphorus... The ripe "buds" produce blue spores similar to (identical to?) those produced by the UAs. I had left my ship on the ground & got a message that it was under attack; returned & everything seems fine, but advise caution-I moved my ship further up the valley away from the spores..
When you shoot the spikes the UA seems to produce angry noises- my hypothesis is that the spikes may in fact be appendages produced by & attached to the barnacle itself. There may be trouble if/when it decides to open that orifice on the top of the shell!
Goodnight Cmdrs all!