A great white shark has died after barely three days in a rare case of captivity in a Japanese aquarium.
The 3.5 meter (11.5-foot) shark, which was accidentally caught in a net in southwestern Japan on Tuesday, died early Friday, according to Okinawa Churaumi Aquarium. The cause of death was under investigation.
An official for People for the Ethical Treatment of Animals, or PETA, Asia, criticised keeping the shark in captivity as "cruel and wrong."
"The cause of death is clear: captivity. The shark never had to die like this," said Jason Baker, PETA's vice president of international campaigns.
Aquarium researcher Keiichi Sato said the aquarium abides by Japanese and international laws and believes its efforts contribute to education and science.
"Many visitors had asked us to exhibit the great white shark," he said in a telephone interview from Okinawa.
The aquarium had announced the rare successful exhibition of the species earlier this week.
The captured shark, a male, was relatively small, and had appeared to be doing well, swimming with several other sharks, but suddenly got weak and sank to the bottom of the tank. Efforts to give it oxygen in a separate special tank failed. It had refused to eat any food since being caught, according to a news agency. - Idrak