Mobile flytrap

Mobile flytraps are present in Biosphere in Metroid: Other M and will attempt to eat Samus Aran. Some are present in the background and do nothing but some attack Samus. They can be destroyed with Missiles or a Morph Ball Bomb from inside or nearby. If Samus is not careful they can sap enough of her Energy to send her flying to the ground, even to the point of death. This makes them similar to Samus Eaters in Super Metroid and Metroid Fusion.

This species can be seen feeding on Reos, one of the rare examples of "monster infighting" in the Metroid series that isn't staged. Similarly, Tangle Vines, another plant species in Metroid, can be seen eating Gerutas in Metroid: Zero Mission.

Metroid.com
Biosphere

"Sector 1 of the BOTTLE SHIP is known as the Bioshpere. The lush, tropical environments are home to all kinds of jungle creatures, like Rios, Keyhunters, and mobile flytraps. Almost all seem aggressive and hostile."