In this popular summer season of cruising, the waters are full of new developments. Here are a few of the most tempting tidbits:

Celebrity Cruises just launched Infinity, a chic ship that boasts the industry’s largest penthouse suites, at nearly 3,000 square feet, complete with veranda. And when you finally vacate that veranda, try a treatment in Infinity’s 25,000-square-foot AquaSpa, the most sizable spa at sea, or visit the world’s first floating conservatory. (800) 437-3111, www.celebritycruises.com

The new wave in fine dining: Big-name restaurants are going to sea. Passengers on Crystal Cruises can now savor the flavors of Valentino, the celebrated Los Angeles-based eatery, by way of Prego restaurant, onboard the line’s Crystal Harmony and Crystal Symphony ships. (800) 820-6663, www.crystalcruises.com. Over at Carnival, patrons clamor for crab claws from the famous Joe’s Stone Crab Restaurant in Miami Beach. They’re served in the Nouveau Supper Club aboard Carnival’s Spirit. (800) 227-6482, www.carnival.com

Radiance of the Seas, Royal Caribbean’s latest venture, claims her place in history as the first cruise ship where guests can play billiards onboard (think about it — it takes a special self-leveling table). It also delivers one of the first serious at-sea steakhouses, Chops Grill. And Radiance really lets you see the sea — with all-glass elevators that face the water. Add the vibration-free, smokeless gas turbine engines, and you’ve got one smooth-sailing vessel. (800) 327-6700, www.royalcaribbean.com