Yeah. Early in the comments I've seen people bring this up and it practically gets discarded so I'll see if I can't get it going more again..
The image we keep looking at from the trailer shows a SRV driving up to what to me appears to be a thargoid warship. Someone earlier did a comparison that showed it pretty obvious. My belief is that the "barnacles " are the glowing green pillars around it. What are they? Probably debris and/or contamination from the ship. Just like the UA does. They prbably contain meta-alloy the thargoids build their ships from. A lot of people keep basing their ideas off of the barnacles growing somewhere which I just don't think is the case.
More evidence? The patch notes talked about taking off from barnacles and crashed ship sites. MB has led us to think they spawn like the crashed anaconda.. so.. crashed thargoid ship makes sense right?
Of course I could be very wrong as well. But I feel like we should be looking with our eyes and not trying to "science the




out of this"