Unagi (うなぎ) is freshwater eel. Anago (穴子, or アナゴ) is saltwater eel.

"Unagi" is a water serpent, or eel

The Japanese eat eel in the height of summer for extra energy.

It's a Japanese eel. It has white flesh and is eaten grilled, tempura fried, or steamed.

I love Japanese food! But if there are some food that I hate it's squid and eel (well maybe most people like eel but not me!), whale, umeboshi (dried/salted plum).

I think I know more but for now I can't remember so much