New liverock critters.

[Fluff]

Got these on my new liverock. I know what some are but would like any info you can give.

#54 is some type of flatworm. Any info you can give on this would be great.
#15, some type of fireworm? It's a greenish brown color with spines on the side.
#36 I have no clue. It's long, the part in the pic is it's tail and it's about twice that long.

Thanks

 

[electrikat]

the last two resemble bristleworms.

 

[XXFirefighter]

last 2 r bristleworms...