Gulper eels have a similar lifespan to humans and can live up to 85 years old. However, their age depends on their habitat and the availability of food.
The only predators that prey on flathead catfish are members of their own species and humans who catch them for commercial and recreational purposes.
Leptocephali have flat bodies filled with jelly-like substances, surrounded by a thin layer of muscle.
The Giant oarfish (Regalecus glesne) holds the Guinness Book of World Records for the longest bony fish in the world.