A Tsumuri is a creature found in the subterranean caverns of SR388 in Metroid II: Return of Samus and Metroid: Samus Returns. They resemble Earth snails and crawl around aimlessly.


In Metroid II, these creatures are found early on in the main tunnel and in a vertical shaft close to a Chozo building. They behave identically to Moheeks and Zebesian Zoomers, but move noticably slower than both of them.

In Metroid: Samus Returns, these creatures are significantly more common. Upon seeing Samus, they will quickly crawl away from her and leave behind a green substance on the floor to damage her. Red Tsumuris are more powerful and found in the deeper caverns later in the game.

Official data Edit

Metroid II manualEdit

"This snail-like creature has very sticky legs and will creep along the walls and ceilings of the caverns."

Metroid: Samus Returns Official GuideEdit

Inhabitants & Eco System of SR388 (p. 17)
"Tsumuri are giant snail creatures that use their toxic slime as a defense mechanism. Most Tsumuri you encounter peacefully crawl around their area, only releasing toxic slime when approached. There are, however, the red Stronger Tsumuri that constantly leave behind slime trails, but even these aren’t aggressive. They’re often easily avoided or defeated. If you don’t have a clear path around them, don’t attempt to move forward without defeating them first."
Walkthrough (p. 45)
"If you choose to explore the high-temperature area beyond the Charge Door, you’re immediately greeted by this little fella. Tsumuri aren’t tricky enemies to deal with—three missiles and they’re done—but they can be troublesome. They coast slowly up and down walls and platforms, but if threatened, they run away while discharging an acid-like substance in their wake. Standing in that substance for more than a second causes you to take continuous damage as long as you’re in it. Tsumuri’s hard shells also make defeating them difficult without an explosive weapon, in which case every encounter becomes a slow, somewhat careful endeavor."
Walkthrough (p. 128)
"Stonger Tsumuri are faster than their blue counterparts. More accurately, they always move at a fast pace, whereas regular Tsumuri only move fast when scared.

A bigger difference between this Tsumuri and the one you’re used to is its slime trail. Regular Tsumuri only leave a trail of acidic slime when threatened, but Stronger Tsumuri create a continuous trail of slime.

Stronger Tsumuri are more predictable than regular Tsumuri because they don’t get startled; they do, however, charge at anything that approaches them. Shoot them with missiles at a distance to avoid potential problems."


  • Their name may have been derived from tsunamis.
  • They rather resemble Zoomers, and in fact, their name seems to be a rough derivation of that creature's name.
  • It is unknown whether or not the Tsumuri species became X Parasite hosts, as Samus did not encounter any Tsumuri-X in Metroid Fusion.
  • In Metroid: Samus Returns, the first Tsumuri is seen in a superheated room, suggesting it is accustomed to that kind of climate.

Gallery Edit