The Alpha Blogg is a boss character in the GameCube video game Metroid Prime 2: Echoes. The Alpha Blogg is the largest of the Blogg species, and also happens to be the head of them all. It has been suggested that there are more than just one of them, though in Echoes you'll only have to fight a single Alpha Blogg, who appears as one of the bosses.
They attack their opponents by performing multiple different attacks. Their "sonic disruption blasts" are capable of making Samus Aran's visors and weapons mishap. During the fight, it'll also violently attempt to eat Samus, which will give you access to shoot its mouth.
She'd find the Alpha Blogg in the Hydrochamber, where the battle would ensue.