Biologists at Odense Zoo in Denmark on Thursday dissected a lion in front of hundreds of visitors, as the zoo announced on Facebook.
Children and their parents were watching as the two biologists dissected the predator and explained its internal organs.
It is perfectly normal in Denmark to convey knowledge about the animal kingdom this way.
Only last year, Copenhagen Zoo had killed giraffe calf Marius and dissected him publicly.
The case triggered international protest and social media outrage.
The present case also caused consternation during the autumn school holidays in Denmark.
By Thursday, an online petition against the dissection had collected 130,000 signatures.
The lion had already been killed in February, aged 9 months, because the zoo did not have enough space and wanted to prevent incest among its lion population.
The dead animal had been stored frozen.