Japan: Large Swarm of Fish Appears in Osaka’s Dotonbori River

An unusual sight was seen in the Dotonbori River, Minami district of central Osaka, on Thursday, December 18, as a large number of fish filled the river. According to experts, "It is possible that mullet, which are sensitive to temperature changes, have escaped to a relatively warmer place in response to the drop in water temperature."

Mysterious fish on display at aquarium in central Japan

Mysterious fish on display at aquarium in central Japan

A giant oarfish, a fish species usually living in deep tropical seas, is on display at the Niigata City Aquarium in central Japan on Feb. 9, 2016. The 3.3-meter-long fish, weighing 14.5 kilograms, was found in a fixed fishing net off Sadogashima island the previous day. Little is known about the biology of the fish with a silver white long scaleless body and a red dorsal fin. The fish is known in Japan as "Ryugu no tsukai," or "Messenger from Dragon palace," an undersea palace in Japanese folklore. (Kyodo) ==Kyodo

Mysterious fish on display at aquarium in central Japan

Mysterious fish on display at aquarium in central Japan

A giant oarfish, a fish species usually living in deep tropical seas, is on display at the Niigata City Aquarium in central Japan on Feb. 9, 2016. The 3.3-meter-long fish, weighing 14.5 kilograms, was found in a fixed fishing net off Sadogashima island the previous day. Little is known about the biology of the fish with a silver white long scaleless body and a red dorsal fin. The fish is known in Japan as "Ryugu no tsukai," or "Messenger from Dragon palace," an undersea palace in Japanese folklore. (Kyodo) ==Kyodo

Tokyo aquarium resumes tuna-school exhibit after fish deaths

Tokyo aquarium resumes tuna-school exhibit after fish deaths

A tuna school swims in a water tank at Tokyo Sea Life Park on June 22, 2015, after the aquarium brought in 77 new tuna and put yellow tape on the tank's transparent wall to prevent the fish from crashing into it. A mysterious recent fish kill almost wiped out the tuna population in the tank. (Kyodo) ==Kyodo

Tokyo aquarium resumes tuna-school exhibit after fish deaths

Tokyo aquarium resumes tuna-school exhibit after fish deaths

A tuna school swims in a water tank at Tokyo Sea Life Park on June 22, 2015, after the aquarium brought in 77 new tuna and put yellow tape on the tank's transparent wall to prevent the fish from crashing into it. A mysterious recent fish kill almost wiped out the tuna population in the tank. (Kyodo) ==Kyodo