This is Tamiya's first water based Robocraft, the Mechanical Blowfish. With a comical inflated design, this cute little blowfish is loads of fun to build, loads of fun to play with, and educational too! The Mechanical Blowfish is propelled forward by a left-right moving tail fin rotated by a crank and link rod. The rounded body gives the Blowfish a unique look different to the flat design of previous Robocraft pieces.