We were told the game was down. A blown fuse and a power cord were the only issues. Then a little gameplay.
Battle Shark (バトルシャーク) is a first person shoot 'em up arcade game released in 1989 by Taito. The player looks through a submarine periscope in order to destroy enemies, featuring simulated damage whenever the player gets hit by either an enemy torpedo or a missile.
MattyMo's Arcade presently has 494 views for Battle Shark across 1 video, and less than an hour worth of Battle Shark videos were uploaded to his channel. This makes up less than 0.06% of the total overall content on MattyMo's Arcade's YouTube channel.