Originally responded, but the more i look at the pics, the more i thought differently.
Without segments, i originally thought cyano. But every strand is perfectly linear... probably not cyano. But, I believe typical gha sites some segments and wouldn't be perfectly linear either.
The straight strands may actually be a type of diatom... they do look golden color in the pics.
If you're worried about dinos, I don't see any in the pics.