Pushing plunger in tail causes mandibles to move in both modes
Scuba is the fastest Cybertron under water. His tentacles bind the enemy to absorb their energy with the suction cups, then his sharp fangs finish them off. He prefers solitude and is shy, and he tends to quickly take gloomy view of things. He is somehow excellent at penmanship, and sometimes asked to write a love letter or a challenge for the others... "There is no way this will work, why don't you give it up already!"