Eels are perfectly normal. I have spent a lot of time with eels in their natural environs, adults, adolescents and babies. They are perfectly normal. There is nothing strange about eels. Their journey is not strange either. No more strange than a monarch butterfly or an osprey from Maine flying to Colombia for the winter. Why is it strange for an animal to migrate? Why is it strange for an animal to be long-lived ? Ducks migrate as far as eels. Why don't we call mallard ducks in the town park strange ?
The only thing strange is our willful and stubborn ignorance about eels.