The Blogg is a large, aquatic predator native to the Torvus Bog. A highly dangerous creature with large jaws, the Blogg is one of the most serious threats to Samus Aran when she is underwater. In order to stun their prey, Bloggs can launch sonic blasts through the water. These blasts will also interfere with Samus' Visor. Bloggs have a nearly invincible hide covering their bodies, making it almost impossible to harm them. However, as it attempts to rush its target with its jaws spread wide, it exposes its vulnerable mouth. The Blogg is the adult stage of its species, being preceded by the infant Bloggling. The leader of a group of Bloggs will become much larger and more powerful, turning into an Alpha Blogg. An Ing infected Blogg is called a Dark Blogg.
"Morphology: Blogg Incredibly durable aquatic predator. Powerful, fast moving water dweller. Outer hide is impervious; heavy weapon hits will only aggravate it. Its mouth, however, is vulnerable to damage. The Blogg uses speed and agility to close in on prey. It will batter foes with a ramming attack, then use its three tooth-filled maws to finish the job. Bloggs have a weak spot inside their mouths: the rest of their bodies are covered with a thick, damage-resistant hide."
Collecting a Power Bomb before Torvus by using Secret World techniques, using it to drain the Half-pipe in Gathering Hall, and then reloading the room causes a flying Blogg. Similarly, morphing or using the Screw Attack on the precise surface of a water body will cause the water to disappear until it or the room is exited. Both of these methods allow for the Screw Attack to be used on a Blogg, which is not normally possible.
If a Blogg rams into Samus while she is in Morph Ball, it will gnaw at her and then spit her out.