Fireworm is a term used to refer to certain types of marine worms which are found in coral reefs. However, there are many other terms which can also be used to describe these creatures. Some people use the term 'beard worm' to describe them, while others might call them by their scientific name, which is polychaete. Other synonyms for fireworm might include 'bristle worm', 'scale worm', or 'sea mouse'. Regardless of what you choose to call them, these marine creatures are known for their bright colors and ability to survive in harsh environments. So whether you're studying marine biology or simply interested in these fascinating organisms, there are plenty of words you can use to refer to them.