Yes, the olive brown seaweed is Fucus serratus, as shown in the keywords. The red seaweed is more problematical. It looks a bit like one of the Ceramium species, of which there are eighteen, but all of which have tiny pincher-like (forcipate) tips to the fronds.
Jessica's Nature Blog 
The upper left one seems to belong to the brown algae (fucus serratus or something like that?) What are the others? Beautiful, in any case.
LikeLike
Yes, the olive brown seaweed is Fucus serratus, as shown in the keywords. The red seaweed is more problematical. It looks a bit like one of the Ceramium species, of which there are eighteen, but all of which have tiny pincher-like (forcipate) tips to the fronds.
LikeLike