Blue Goo Specters are enemies in Link's Awakening DX. Blue Goo Specters are only found in the Color Dungeon where they hide in blue colored tiles and pop up to attack Link when he gets near them. They are less common and slightly faster than their Green and Red counterparts. Green Camo Goblin Red Camo Goblin
Enemies in Link's Awakening - Zelda Wiki
Fi, Zeldapedia
Jalhalla - Zelda Wiki
Hookshot - Triforce Wiki, a The Legend of Zelda wiki
Blade Trap - Zelda Dungeon Wiki, a The Legend of Zelda wiki
Giant Ghini - Zelda Wiki
Blue Goo Specter - Zelda Wiki
Phantom Ganon - Zelda Wiki
Spiked Beetle - Zelda Wiki
Link - Triforce Wiki, a The Legend of Zelda wiki