I've a few seaweed photos from this year and would really appreciate ID help and pointers if possible with them.

I walk past and over it but have to admit that I've never really tried to identify any before now - its time to start looking closer!
All are from the SW coast of Ireland and the numbers are to the left of the relevant photo.
Q1.

Q2.

Q3.
Q4.

Q5.

Q6.
Q7.

Q8.

Q9.
Q10.
Thanks in advance,
Jenny