they look like little pinheads. i cant see mushies growing under water though they do need damp areas lol.. no idea man i do find myself fairly well versed in mycology too
Thanks for the replies, guys - I forgot about this thread for a while.
They don't seem to 'do' anything, and shrimp, snails and guppies don't seem to show any interest. I don't think it is something leaching out of the block - when you see them in person, they really look like something that has grown.
if we have a weird growth competition, you guys will vote for me right?