8518 Jet Ray is one of the Ben 10 LEGO sets released in 2010, intended for ages 5-12. The box erroneously lists "Jet Ray" as two words, though it's only one.
"In Ben 10 Alien Force, transforming into the agile Jet Ray gives Ben the ability to swim through water or fly at several times the speed of sound and sting adversaries with powerful neuroshocks. Buildable by kids aged 5+. Based on popular Ben 10 Alien Force story where 15-year old Ben Tennyson discovers 10 different alien heroes on the omnitrix."
The super-fast Jet Ray is swooping in to save the day!
It's hero time! When danger threatens the planet in the water or the air, Ben transforms into the super-sonic Jet Ray. This alien hero has the ability to fly and swim faster than the speed of sound, and can stun his enemies with powerful neuroshock stings! Features glow-in-the-dark eyes and Omnitrix chest symbol. Collect all 6 LEGO Ben 10 Alien Force sets and combine them to create your own super alien heroes! Collect all 6 LEGO Ben 10 Alien Force minifigures! Measures 9" (23cm) tall!