Water resistance has been a key selling point for Sony smartphones for the past couple of years, and now the company is highlighting its phones' underwater credentials with a series of quirky new apps. Sony's underwater collection, available in the U.S. on Google Play, showcases ways in which the company's waterproof phones can detect when they're subjected to varying levels of water — from a light rain shower, to being fully submerged. To determine whether the phone is underwater, the apps can emit a high-frequency sound, then use the microphones to detect how that sound resonates, giving an indication of whether it's submerged.

Examples include an animated fish which flops around unless it's underwater, an underwater "endless runner" game and a virtual cactus which springs to life on your device. You'll find more details on Google Play at the link above, though you'll need to be in the U.S. to see the apps — they're designed for the T-Mobile-only Xperia Z1s. Otherwise, the demo reel above does a good job of showcasing each app without requiring a Sony phone — or dunking it in the water.

Source: Google Play; via: GSM Arena