** Shares of cruise operator Carnival Corp CCL.N down ~8% at $27.74

** Co forecast third-quarter profit below estimates, as lingering impact from higher fuel prices remains a drag on the cruise operator's margins amid geopolitical tensions

** Expects Q3 adjusted EPS to be about $1.35, compared with analysts' estimates of $1.42 - data compiled by LSEG

** Reports Q2 revenue of $6.67 billion, slightly below estimate of $6.69 billion

** Posts Q2 adjusted EPS of 41 cents, vs estimates of 35 cents

** Co says it was "overcoming extreme geopolitical headwinds and nearly 30% higher fuel costs" in Q2

** Shares of peers Norwegian Cruise Line Holding NCLH.N down ~2% and Royal Caribbean RCL.N down 5% after the results, amid broader market decline .N

** As of last close, CCL down ~11% YTD