The same legal sources apply. For Sharktopus (2010) and Sharktopus vs. Whalewolf (2015), use Tubi or Peacock. Do not search for torrents.
Many torrented files are "cams" or low-bitrate rips that don't do justice to the vibrant (and ridiculous) visuals of the film. How to Watch Safely and Legally Sharktopus vs. Pteracuda torrent