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FF4 PSP Octomammoth Field.gif

The Octomammoth, also known as Octomamm, is a boss from Final Fantasy IV. It blocks travelers using the Underground Waterway to reach Damcyan. Tellah has trouble defeating it, and recruits Cecil and Rydia to do it.

The Octomammoth was once an ordinary octopus that was mutated by unspecified "underwater experiments." Tellah comments that it is "an octomammoth," indicating it is not the only mutation of its type.

Octomammoth is weak and only uses physical attacks. Cecil should attack while Tellah and Rydia cast Thunder.



Easy Type

Other appearances[]

Pictlogica Final Fantasy[]

PFF Octomammoth.png
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Final Fantasy Record Keeper[]

FFRK Octomammoth FFIV.png

The Octomammoth is vulnerable to lightning and darkness. Try using the black mage's Lightning and Darkbolt abilities on it, kupo!

Dr. Mog's Advice

Octomammoth is the boss of Underground Waterway.

Target Scores
  • Exploit weakness to Lightning
  • Exploit weakness to Dark attacks
  • Attack: Deal physical damage to one target.

This battle also follows the patterns of its source, but it is likely the player will not be able to hit both targets unless the Black Mage has incurred enough damage to build his Soul Gauge sufficiently. The player only needs to cast each spell once, though, and can continue to hack at the beast until it falls. Since it initially has all eight arms, the Octomammoth strikes fast at first, but not hard; it will slow as its limbs drop away, but hit harder. White Mages can again Protect and Cure allies to soften the blows dealt.

In Elite mode, the Dark spell and high-level Thunder magic should make short work of it, with White Mages assisting as above. Tellah waited behind a Bonus Quest for the player, prior to The Burning Blade.

Element Vulnerability
Fire Normal
Ice Normal
Lightning Vulnerable
Earth Resist
Wind Normal
Water Absorb
Holy Absorb
Dark Vulnerable
Poison Normal



The numeral prefix "octo-", from Latin for the number eight.

A mammoth is any species of the extinct genus Mammuthus, one of the many genera that make up the order of trunked mammals called proboscideans. The various species of mammoth were commonly equipped with long, curved tusks and, in northern species, a covering of long hair. They lived from the Pliocene epoch (from around 5 million years ago) into the Holocene at about 4,000 years ago, and various species existed in Africa, Europe, Asia, and North America. They were members of the family Elephantidae, which also contains the two genera of modern elephants and their ancestors. Today, the word "mammoth" is often used to describe abnormally large animals or objects.

Related enemies[]

Final Fantasy IV: The After Years[]