Halle Berry Fights Legal Battle ... in a Bikini

At the same time Halle Berry was frolicking around Spain in a teeny, tiny AWESOME bikini ... she was sending her lawyers into battle back in L.A. today ... to once again fight her baby daddy Gabriel Aubry.

Sources connected to Halle tell TMZ ... Aubry, who is also in Europe, has been throwing a fit over custody issues involving their daughter Nahla while Halle shoots "Cloud Atlas" in Europe -- and we've learned, Halle's lawyers were in court today to put out the flames.

Halle's lawyers Neal Hersh and Judy Bogen were in court today to address Gabriel's bellyaching -- and while it's unclear exactly what happened during the proceedings, the two walked out with huge smiles on their faces.