2005 Japanese anime film: Negadon: The Monster from Mars

Here’s a cool tokusatsu-style 25-minute CG-animated anime film from Japan titled Negadon: The Monster from Mars (2005). According to Wikipedia, the storyline is set in the year 2025 and revolves around a rock formation that is found buried beneath the surface of Mars during a terraforming project. When the seemingly-harmless object is brought back to Earth, it grows into a colossal crustacean life form, Negadon, and promptly attacks Tokyo.