Why eels die after laying egg?

Eels, particularly the European and American species, are believed to die after spawning due to the immense physiological stress and energy depletion involved in the spawning process. Their migration to breeding grounds, such as the Sargasso Sea, is a long and arduous journey that takes a toll on their bodies. After laying eggs, they have fulfilled their reproductive purpose, and the lack of energy reserves contributes to their mortality shortly thereafter. This life cycle strategy ensures that they can invest all their resources into reproduction, allowing their offspring a chance to survive.