Translucent Gorgonian Shrimp (Manipontonia psamathe) with internal parasite worm, probably a parasitic flatworm inside it.
These parasitic worms could either be phylum Platyhelminthes, family Fecampiidae or phylum Nematomorpha.
Similar to Nectonema agile and Fecampia erythrocephala (for examble, but not Id).
Nectonema melanocephalum occurs Western Central Pacific: Indonesia.Life cycle: Eggs hatch into encysted larvae and live as a parasite for some time before becoming a free-living adult. Their crustacean hosts remain to be determined.
Unfortunately, no more information available. If you have any information or an Id, do not hesitate to contact us.