Sea monsters are
mythical or legendary creatures, believed to dwell in the sea and often imagined to be of immense size. Marine
monsters can take many forms, including sea
dragons,
sea serpents, or multi-armed beasts. They can be slimy and scaly and are often pictured threatening ships or spouting jets of water. The definition of a "monster" is subjective, and some sea monsters may have been based on scientifically accepted creatures such as
whales and types of
giant and
colossal squid.