PENGHU, Taiwan, - A man fishing in Taiwan captured video of a mysterious worm-like green sea creature crawling onto land and shared it online. Wei Cheng Jian posted video of the creature he encountered in a Penghu port on Facebook, where commenters theorized it could be a ribbon worm, or Nemertea. Ribbon worms have a proboscis that extends from their body while hunting, which could explain the green creature's long tongue-like appendage. The proboscis covers the ribbon worm's prey in a thick, poisonous mucus. The creatures usually live in the sea, but have been known to seek shelter in cool,...