June 9 (SeeNews) - Croatian hotel operator Valamar Riviera [ZSE:RIVP-R-A] said on Friday it has opened its 4 star Family Life Bellevue Resort and its 4/5 star Valamar Girandella Resort in Rabac, on the Adriatic, following an investment worth 562 million kuna ($84.7 million/75.8 million euro).