Triclops

Triclops are small creatures that can only be encountered when Samus is in Morph Ball form. They prowl tunnels and can survive high temperatures. They collect small creatures and bits of foodstuff, then deposit them elsewhere for later consumption. Their hard tripartite mandibles are used to move earth and rock. The strength of these mandibles is incredible; they can grasp the morph ball so tightly that the mandibles are nearly inescapable once grabbed.

When Samus encounters them while in the morph ball form, they will scuttle towards her, and if Samus winds up in the path of one, the Triclops will grab her with its mandibles. They will then carry her around the tunnels (usually to an exit in the area) and "spit" her out, damaging her while doing this. To avoid this, Samus must lay a Bomb as a trap of sorts. The Triclops will then go for the Bomb, and attempt to take it to a personal depot area for later consumption. But the Triclops will promptly explode just moments later.