Ameboid

Ameboid is an enemy that can be found at the gate from Smithy's Factory in Super Mario RPG: Legend of the Seven Stars. It doesn't have high HP, but if Mario and company attempt to defeat it in a single attack, Ameboid will split into five individuals. They will have the same stats as the original. Outside of battle, they are merely small blue spots who become bigger and reveal themselves to be Ameboids when they are approached. Their relation to Smithy is unknown and may just be natives of his dimension. They are strong against jump attacks and weak against fire, so Bowser is a good choice to take it down.

Trivia

 * Ameboids highly resemble blue, jelly-like Goombas and may be the Factory counterpart to them.
 * An actual Ameboid, for which Ameboids are named, is a type of protozoa.
 * Chester bears a tan-colored Ameboid inside its chest.