Being an amorph said to come from a sea of blood, found most commonly near battlefields and other places where battle-gore flows in rivers. A constant internal burning sets the crimson spray splashed upon it to boiling, spreading the rusted-iron scent of old blood on the air... a scent known to call other spirits of the dead. With this in mind, should you happen to encounter one of these foul things, be done with it quickly, or you may find that you have more on your hands than you bargained for.
Foobar can use Mythril Bubbles to Confuse party members, and are often accompanied by other difficult enemies, including the dangerous Leamonde Entite. Foobars also join in the battle against the Esper Cúchulainn, and can still be fought there even after the Esper is defeated. They are weak against Holy.
The name Foobar is believed to be derived from the acronym FUBAR. This may be supported by it being made up of blood from unidentifiable battle remains. The name may also have been derived from foobar, a common placeholder used by computer programmers.