Dear Majid,

Assallam,

According to my opinion, It seems Faciola hepatica or liver fluke as zoonotic parasite between human and some domestic animals such as cattle or sheep.

It belongs to :

Phylum: Platyhelminthes

Class : Trematoda

Order : Digenea

It is distributed throughout the world and it attacks to sheep and cause liver rot disease in them.

If you pay attention to top circle in the picture it should be ventral sucker of the parasite. It is useful for ingestion and adhesion.

Also, intestinal branches and reproduction system are visible inside the above parasite image. Let me present you some similar pictures in attached files.

Hopefully my diagnosis was correct!

Kindly regards

Yes, It is a fluke Trematoda. From this picture I can say that is not Fasciola hepatica or Opistorchis felineus. 

Thank for all friends are commented on the on the Publications. ..this is digenea parasite colleget from some marine fish from gulf region. And I use program instead of camera lucida digram ..and the original photo. .attached. .Anown genus and speices 

Regards 

To give even a preliminary id, one need Host, Locality in host and photos of stained helminth that at least most important organs, testes, ovary, vittelaria, suckers are visible.

Dear Ali thanks.for your comment. All anformintion are present 

It is not possible to identify species from the photographs (see https://www.researchgate.net/publication/310670794_Photography-based_taxonomy_is_inadequate_unnecessary_and_potentially_harmful_for_biological_sciences ). For this, drawings of the external morphology and of the internal anatomy are necessary. The fixation organs of the parasites must be precisely described.

Article Photography-based taxonomy is inadequate, unnecessary, and p...

It may be a monogenic fish parasite, Where you found it

Dear Aziz....monogenea parasite  are regonize ...by many thinks as you know and esay to identify it .by haptor and athors thinks....

Regards 

The specimens are send to natural. Hist.museum for identification. ..wating answer 

Dear all friends. ..the final taxonomy is

Helicometrina nimia Linton, 1910 (Digenea: Opecoelidae)

That species are new record in iraqi marine water ...

I shall publish it and send some of them for genetic study recognized. ....

Ia orana,

A bit late but just for other identification help, Dr Thomas CRIBB is the trematode specialist of reef fish parasites at UQ (Australia). I worked with him in French Polynesia and New Caledonia too.

 Thanks Cédrik Moana LO for your comment. ..I know Dr Thomas. ..but can't send the specimens to him

Regards 

I agree with the attribution to Helicometrinae. The shape of uterus is the most typical feature of this Opecoelidae