Glowfish (Steam key).

http://store.steampowered.com/app/60350/Glowfish/
The evil Dr. Urchin has kidnapped Coralline! It’s up to Glowfish to free his lady friend and sea pals everywhere from his clutches in this underwater platform adventure.
Beware—while you scour the ocean floor in search of lost friends waiting for rescue, a host of enemies is lurking! Each level takes you deeper in the unique ocean world with new challenges and enemies at every turn. Gather your friends to make Glowfish bigger and better at challenging the boss on each level. Set the captive friends free by surrounding Glowfish with a powerful circle of friends, or circle the enemy to fire your blasting bubbles and win the battle.
Add to your team by collecting powerful Super Chums to help you along the way, and upgrade them by collecting coins to give you even more of an edge in each boss battle! Dive in and be prepared to be dazzled in Glowfish.
Key Features:
50 A-Maze-ing platform adventure levels
Unlock all 8 Super Chums
Collect coins to upgrade your Super Chums to prepare for each Boss Battle!
25 Steam Achievements