Photograph 1 may be Pterocladia heteroplatos.

Dear Sir,

Many thanks for your reply. I think it may be Laurencia sp.

Thank u and you may be correct 

Dear Sir,

It may be Soleria

 Thanks

I too think it looks like Laurencia

Dear Sir, 

Thanks a lot for your answer. 

Sir, what is your opinion about the bottom 2 images [A & B] ? 

It could also be Laurencia plants in very tender age. The grazed morphology makes it hard to identify.

Sir, Many thanks for your kind reply.

It is Laurencia obtusa (Hudson) Lamouroux 

Dear Sir, 

Thanks for your answer.