The Blue-Marine, a submarine, is available solely on the water planet Aquas. The Blue-Marine can upgrade its twin lasers, but it cannot make use of Smart Bombs. It makes up for this with an unlimited supply of torpedoes which not only damage enemies but also produce bright bursts of light, allowing the player to see in the ocean depths. The torpedoes can also lock-on to enemies just as the charged up lasers can in the other vehicles. The submersible also has a shot-deflecting barrel roll in addition to boost and brake capabilities.