The Blob

The Blob is the main antagonist of the 1988 sci-fi horror movie of the same name. It is a highly corrosive, pink colored, gelatinous lifeform that becomes bigger with the more that it consumes. It was created by a government organization as a bioweapon and landed from space in a man made asteroid near a small California town where it began to wreak havoc.

For what little personality that The Blob actually shows, it's an instinctual yet cunning and calculative predator.

Given that its literally a shapeless slime means that the organism is easily capable of fitting through various different openings and can morph into different shapes, it can also scale walls and ceilings as well. Some of The Blob's other abilities include its corrosive nature, being able to dissolve any living organism it comes into contact with as well growing bigger the more it absorbs. It also can form tendrils from its body.

The only real weakness that the creature possesses would be its invulnerability to colder temperatures.

It's basically some type of acidic gelatinous goo/slime with pink coloring.