A Mechasaurus that appeared in Episode 13 of Getter Robo.
Emperor Gore sends out a Mechasaurus to distract the Getter team from the construction of a sea site that he plans to build. When the Mechasaurus starts attacking boats around the area, Musashi, Ryoma, and Hayato check it out with Michiru. Musashi spots a boat exploding, so he and the others combine into Getter-3. As they investigate underwater, the Aquatic Mechasaurus appears underneath them and attacks them. Getter Robo was about to attack back, but the Aquatic Mechasaurus tries to swim away. However, Getter Robo manages to reach it’s tail and swing it around. Before it retreats, Getter Robo fires it’s missiles and destroys the tail. Later, the Aquatic Mechasaurus is seen destroying another ship, alerting the Getter team again. When Emperor Gore sees that Musashi is not piloting Getter Bear(due to him practicing for an important Judo contest), he sends out Mesa to attack Getter Robo. After the appearance of Mesa, the Aquatic Mechasaurus is never shown again.
Adapted Swimmer: The Aquatic Mechasaur can swim through water.
Mouth Missiles: The Aquatic Mechasaur can shoot two missiles out of it’s mouth.