The Sandmarine is the fourth boss of Metal Slug 5.
This is a special submarine created by the Ptolemaic Army, designed to travel under the ground.
The boss will sink and emerge from the sand all the time, while launching a volley of fireballs that are tricky to dodge. It can also fire electric projectiles from the back that track the player, or shoot its frontal cannon. If you stand in front of it for too long, it may also fire two missiles that go straight ahead. They can be hard to dodge if the Sandmarine has you backed up right against the left side of the screen.
|Sand Marine: The original model.|
|Deep Sand Marine: A variant of the Sand Marine which is designed for underground excursions. Appears in Metal Slug Attack.|
|Golden Sand Marine: A variant of the Sand Marine which has been painted gold. It is capable of submerging itself and has more durability compared to its other variants. Appears in Metal Slug Attack.|
- In the arcade flyer for MS5, the Sandmarine can be seen and it is clearly visible that it had a different design than the one it uses in-game, this may have been either an early concept of the Sandmarine or the true design for it if the game had not been rushed.
- It slightly resembles an enemy from the game In the Hunt.
- You can see the emblem of the Ptolemaic Army on the Sandmarine; the upside-down triangle with the T in the middle.
- In Metal Slug Attack, a unit called Land Blowfish was added. Its appearence is very similar to Sand Marine's concept art