of a living thing emitting light.

And, in a small coastal town in central Japan,

one glowing creature is also a delicacy.

Toyama Bay is around 4,000 feet deep,

one of the deepest bays in all of Japan

and home to one of the only commonly edible

bioluminescence species in the world.

- [Narrator] Firefly squid fishing

isn't a normal fishing job.

They have to fish in the dead of night.

Bioluminescence sea creatures

prefer the dark depths of the ocean.

But the firefly squid lights up the shores when they spawn,

making them easier to catch.

- [Narrator] Where is all that squid going?

Well, to places like Kappo Araki,

a small Japanese restaurant.

- [Narrator] Chef Araki's menu includes multiple variants

of firefly squid: from salted to grilled, boiled to sashimi.

All of them delicious, and, most importantly, fresh.