“I have rediscovered this worm-like mystery from a few years ago and thought maybe you could help!” states this reader in her submission regarding the long, brownish worm-like organism pictured below. “We live in Germany and we’re walking by a lake on a cold day in February when we spotted this creature under the ice; it was wriggling and moving and most definitely alive. Any ideas? Thank you!” Firstly, we must say that this worm is very odd-looking: we have never seen a worm with these markings, not to mention the bursting, bush-like thing at one end of its body. Secondly, we also have to point out the mysterious circumstances under which our reader discovered the worm; it is not every day you find a worm in a frozen lake.