Katsuo
Katsuo, scientifically known as Katsuwonus pelamis, is a species of medium-sized predatory fish found in tropical, subtropical, and temperate waters around the world. In English, it is commonly referred to as skipjack tuna or bonito. Katsuo is highly valued in Japanese cuisine, where it is known for its firm texture and rich flavor. The fish is often prepared as tataki, where it is briefly seared on the outside and sliced thinly, or as sashimi. Katsuo is also a key ingredient in making dashi, the fundamental Japanese soup stock, when dried and fermented into katsuobushi. The fish is migratory and has a streamlined body with dark blue or purple coloring on its back and silvery-white on its underside. Katsuo is an important commercial fish species and is consumed worldwide in various forms, including fresh, frozen, dried, and canned.