Fear Factor Fish is a term used to describe eels, which are a type of fish that have a slimy, snake-like appearance. They are often found in rivers and oceans around the world and can grow up to several feet in length. Eels are known for their ability to generate electric shocks, which can be used to stun prey or ward off predators. This has earned them a reputation as one of the most feared creatures in the ocean, hence the term Fear Factor Fish.