Mine

Floating Mines, also known as Mines , are objects that first appeared in Super Mario World.

Super Mario World
In Super Mario World, they first appear as spiked balls that drift in the water in various levels. They follow the current continuously and pulsate with spikes. Yoshi can step on their spikes harmlessly and a Super Star can defeat them. In the Sunken Ghost Ship, many are in freefall, making it difficult for Mario or Luigi to move around. They can also be eaten by Yoshi. In this game, they appear to have a wooden texture.

Super Mario 64 / Super Mario 64 DS
Floating Mines play a vital role in defeating Bowser in Super Mario 64 and its remake. In the final arenas of Bowser in the Dark World, Bowser in the Fire Sea, and Bowser in the Sky, where the Floating Mines surround the arena, Mario (or Luigi or Wario in the remake) has to throw Bowser into one of the Floating Mines to defeat him (three in the Sky). If the player jumps into one of the Floating Mines, they will take two wedges of damage.

There was also going to be a smaller, water-based variant, but it was cut out from the final.

Super Mario Galaxy / Super Mario Galaxy 2
The Floating Mines also appear in Super Mario Galaxy. In this game, they are usually immobile, but sometimes move. They can be defeated if they are shot with a Star Bit. They also appear in Super Mario Galaxy 2, where they look and act the same as in the predecessor. In this game, Yoshi cannot eat them. Some of the Floating Mines may release Coins, 1-Up Mushrooms, or Star Bits. Floating Mines found underwater have glowing eyes, and can regenerate themselves after their detonation.

Super Mario 3D World
Floating Mines also appear in Super Mario 3D World in the form of a green spiked ball with yellow spikes. They first appear in Clear Pipe Cruise. They are in the interior of Clear Pipes, blocking parts of them. Some Green Stars are among Floating Mines; if the player hits a Floating Mine, they do not only take damage and lose a power-up, but they are also ejected backwards in the pipe, so its destruction is necessary to pass. They can be destroyed by a Fireball from Fire Mario, a baseball, Invincible Mario or White Tanooki Mario.

Mario's Time Machine
In Mario's Time Machine, Mines appear as obstacles while Mario is surfing around. In the SNES version, hitting one causes Mario to lose all of his Mushrooms, whereas in the PC version, hitting one only causes Mario to lose one of them.

Mario Party 3
In Mario Party 3, floating mines appear in the minigame Cheep Cheep Chase, where they are in the way of the players, who are being pursued by a large Cheep Cheep. To get around them, the players must dive.

Mario Party 6
Floating Mines also appear as a projectile in Mario Party 6, in Sink or Swim. While three other characters are swimming in a body of water, one player tries to drop Floating Mines on their heads. If the Floating Mines hit someone, they do not explode. They simple knock them unconscious.

Super Princess Peach
Floating Mines also appear in Super Princess Peach. When Peach runs into one, she takes half a heart of damage.

Captain Toad: Treasure Tracker
Mines reappear in Captain Toad: Treasure Tracker using the same appearance as from Super Mario 3D World and acting in the same way. They are usually seen in levels with clear pipes and block the way of the player, such as Clear Pipe Puzzleplex. They can be destroyed by using the Super Pickax power-up.