- Water‑based Robocraft kit – This is Tamiya’s first water‑based Robocraft series model. It uses a crank and linkage rod system to propel a robo‑fish through the water by swinging its tail fin.
- Waterproof construction – The white under‑belly houses the motor, gearbox, battery box and switch. Rubber O‑rings and waterproof tape seal the unit to keep the mechanism dry.
- Simple assembly and transparent body – Parts snap together or are fastened with screws, and the transparent green body lets you see the mechanical movement after completion.
- Tail motion and control – A gearbox reduces the motor speed for splash‑free swimming; it takes roughly seven seconds to move one meter. A stopper at the base of the tail can be turned to adjust the swimming direction, and the tail can be cut or reshaped for optimal performance.
- Specifications – The model measures about 197 mm long and 81 mm high and is made from ABS resin. It includes a gearbox and motor, needs one AA battery (not included), and can run continuously for about four hours. Assembly tools include a screwdriver.
The Mechanical Blowfish encourages children to learn about mechanical linkages and waterproof design while
having fun with a swimming robo‑fish.