Yet another mutant biomechanical weapon, building on the proven use of sharks as engines from the UW-33. This was designed specifically for anti-submarine warfare, with greater endurance and intelligence due to the incorporation of a giant squid.
This is a mashup of the giant squid, reef shark and night fighter from the Autodesk 123D Gallery, all combined in Meshmixer.
Update: v8 adds a cockpit greenhouse, and some conical supports for the drop tanks. You still need to print with full support, but the cones keep the tanks from wobbling too much. You should be able to break them off easily.
I've included the full model, and a plate containing the front and back which should print on a Makerbot, using full support material.