Sardines at aquarium in northern Japan

Sardines at aquarium in northern Japan

About 10,000 sardines swim in a water tank at the Noboribetsu Marine Park Nixe in Noboribetsu on the northernmost Japanese main island of Hokkaido on June 30, 2023.

Sardines at aquarium in northern Japan

Sardines at aquarium in northern Japan

About 10,000 sardines swim in a water tank at the Noboribetsu Marine Park Nixe in Noboribetsu on the northernmost Japanese main island of Hokkaido on June 30, 2023.

Sardines at aquarium in northern Japan

Sardines at aquarium in northern Japan

About 10,000 sardines swim in a water tank at the Noboribetsu Marine Park Nixe in Noboribetsu on the northernmost Japanese main island of Hokkaido on June 30, 2023.

Huge crab at Hokkaido aquarium

Huge crab at Hokkaido aquarium

SAPPORO, Japan - A Hanasaki crab is exhibited at Noboribetsu Marine Park Nixe aquarium in Noboribetsu, Hokkaido, on Sept. 1, 2013. The crab, which was caught in August off Nemuro, Hokkaido, weighs 5.7 kilograms, much heavier than usually found.

10,000 sardines attract visitors in Hokkaido aquarium

10,000 sardines attract visitors in Hokkaido aquarium

SAPPORO, Japan - Visitors look at some of the 10,000 sardines in a tank at the Noboribetsu Marine Park NIXE on the northernmost Japanese main island of Hokkaido on Oct. 10, 2009. Two sharks and three rays live together with the sardines in the tank that opened in July.

10,000 sardines attract visitors in Hokkaido aquarium

10,000 sardines attract visitors in Hokkaido aquarium

SAPPORO, Japan - Visitors look at some of the 10,000 sardines in a tank at the Noboribetsu Marine Park NIXE on the northernmost Japanese main island of Hokkaido on Oct. 10, 2009. Two sharks and three rays live together with the sardines in the tank that opened in July. (Kyodo)

Sardines at northern Japan aquarium

Sardines at northern Japan aquarium

About 10,000 sardines swim at the Noboribetsu Marine Park Nixe on the northernmost Japanese main island of Hokkaido on June 25, 2020. (Kyodo) ==Kyodo

Sardines at northern Japan aquarium

Sardines at northern Japan aquarium

About 10,000 sardines swim at the Noboribetsu Marine Park Nixe on the northernmost Japanese main island of Hokkaido on June 25, 2020. (Kyodo) ==Kyodo