The Schwarzeneggers, Maria Shriver Hit Nobu for a Family Night Out

The Schwarzeneggers got the fam back together Monday night for some fine dining at celebrity favorite sushi spot ... Nobu!

Check out the pics ... it was a whole family reunion with Arnold and his ex-wife Maria Shriver ... plus all of their kiddos -- Patrick Schwarzenegger and his wife Abby Champion, Katherine Schwarzenegger and her hubby Chris Pratt, Christopher Schwarzenegger and Christina Schwarzenegger.

The bunch appeared in great spirits after a successful family outing -- which, as you can see, didn't include any grandkids.

Maria looked exceptionally thrilled to be with all her kiddos and her hubby of 25 years, flashing a grin after munching down on some of the most sought-after sushi in L.A.

Remember, she filed for divorce from Arnold in 2011 after he admitted to fathering a child -- a son named Joseph Baena -- with a member of their household staff years earlier.

But, the exes have put the heartache aside ... and clearly, the fam is all about coming together for some fresh fish.