TED-ED: Eli the eel: A mysterious migration - James Prosek

Eels are fascinating creatures with unique features like breathing through their skin and migrating in the opposite direction of most fish. They are born in the Sargasso Sea and undergo various stages, from transparent larvae to adult eels. Gender is determined in freshwater, with males staying in estuaries and females growing larger upstream. Eels migrate back to the ocean for breeding, undergoing significant physical changes. The breeding process remains largely mysterious, but it's believed to involve mass spawning. After breeding, eels likely die in the ocean, completing their life cycle.

How is the gender of an eel determined?

What is the process called when eels release their eggs and sperm?