True or false?

Last night (9 March 2020), while I was doing a survey in the rocky intertidal zone, an interesting little brown seaweed caught my eye.  I had to get some other things done, but I took a few photos to review later (see below).  The thin and slender brown blades were ~8-10 cm (3-4 inches) long:

 

 

 

Right now I'm guessing that this is Petalonia fascia (sometimes called False Kelp, because it looks like a small kelp at first, but it's not a true kelp).  I'll try to check in with a few seaweed folks to see if that's correct.