Dear Yadav,

Could it be Codium fragile (Suringar) Hariot 1889?

Morphology of this picture seems to be Codium species, but anatomy  may not similar to Codium, ( I am not sure ) If you take some more anatomy photographs of this species then we will come  to the conclusion

All the best

Dear Sirs

Thanks for the valuable comments.

I will take some more anatomical images.

Dear Yadav,

Where do you find it ? 

i think, it could be Codium fragile

Thanks for your message.

It was collected from west coast of India (Arabian Sea).

Dear sir

Many thanks for your message and reply. I will go through and verify it.

Thanks again.