How many increases does the microscope have? Maybe it is an insect larva.

It was in 40* magnification sir.

Will you help to identify this please??? 

dear Nazia

it may be Capitella sp

Dear Abbas sir, 

I checked some pictures of Capitella sp. from Google. But the arrangements of setae of the organism I posted is not alike to Capitella sp. I think it's something different then Capitella sp.

Sir, Do you have any other assumption about the organism I posted?

Ok dear Nazis . I,LL try to check it up