Beetom

From Wikitroid, the Metroid wiki

Beetom
Beetom from Super Metroid jumping.
Featured in	Super Metroid
Homeworld	Zebes
Attacks	Jumping, Crawling on Samus

Beetoms are small parasitic creatures found on the planet Zebes. They are completely unharmed by ordinary Beam weapons (however they can be frozen with the Ice Beam). Their only weakness is either a Super Missile or Morph Ball weaponry. If a Beetom is given the chance to attack, it will leap onto, and attach itself to its prey. After securely attached, it will mimick the attack of a Metroid, and begin sucking the "life energy" from its prey.