Yesterday was "Eel's day" in Japan.
Many Japanese eat "kabayaki" eel, or grilled eel with soy sauce based sauce.
This custom began in Edo era, about 250 years ago.
Gen'nai Hiraga, an inventor in Edo era made propaganda for Eel shop, which sales was not good in summer seasons.
He said, "Let's eat eel on the day of Ox and be active in this hot season!", then the custom spreaded widely.
Nowadays, natural eel became very rare and it became designated as an endangered species in Japan.
It's about 1500yen (about $15) for only a small piece of eel (not natural, cultured one) for one person!
Yesterday, our family (consists of five members) bought a piece of eel and five small pieces of conger and shared the eel.
I felt there were not so much difference between them, but eel was slightly softer than conger and maybe slightly tasted special...