This is a Malaysian giant river prawn -- recently reclassified as
Macrobrachium dacqueti but referred to in most available literature as
M. rosenbergii. The young will be planktonic and probably too small for the parents to pay much heed to -- that's the good news. The bad news is that they will require brackish water and undergo 11 larval stages before becoming post-larvae (recognizable juveniles that walk on the bottom as opposed to floating in the water column).
That's not to say that there is no hope of rearing them; this species is one of the most widely aquacultured freshwater crustaceans, with farms from New Zealand to Israel, and breeding is routine. Consult
this manual (especially
this part) for some background.
Other species of shrimp with similar lifecycles (algae-eating Amano shrimp)
have been successfully bred by aquarists: see
this page and
this page.
I strongly encourage you to attempt to go ahead with raising the young shrimp (this has rarely been done with
Macrobrachium by the average aquarium-owner, but the payoffs can be immense -- the number of eggs per spawn can be as high as 75,000). When the eggs turn gray, they'll be close to hatching:
You can opt to isolate the female and then A) place the young into an already-established brackish tank or B) add salt to this holding tank. I would guess that siphoning them from the main aquarium would more labor-intensive (though their likely attraction to light might help out), and larvae would be lost if exposed to a running power filter.
A salinity of around 12 ppt seems to work well; once they become post-larvae (miniature adults), they can be acclimated back to freshwater at your leisure ... being euryhaline, even adults can tolerate full saltwater. Baby brine shrimp or very fine commercial food can be used. Airstones or possibly a sponge filter should be the strongest water circulation you should use.
