Alien Bomb, a flying and underwater ship that appeared in the UFO TV series, only in “Subsmash”. You can find a link below for the STL version in 3 pieces.

Don’t forget to press the like button if you enjoyed the model, and show what you achieved with the file, should it be a render or a physical 3D printed item

You might achieve something like that if you happen to print and assemble the 3 pieces together