Japanese Animal Cruelity

Watched a live demo of sashimi making last night. The chef peeled off the flesh from a fish till its skeleton, and then put the fish back into the tank, the fish can still swimming around in the tank, albeit off balance.

This reminds me of a sashimi dish in Japan. The sushi chef skillfully peeled off the flesh from a fish, again down to its bare skeleton. The flesh is then cut into small pieces, the skeleton is fixed in a plate, with the fish's mouth still breathing, and the flesh put on top, then served to customers as an expensive sashimi dish.

In ancient times, there was one cruelest capital punishment, which the executioner will cut off the prisoner's flesh bit by bit until his/her skeleton is left. This is one of the most painful ways to die.

Do you see similarities between that ancient punishment and the way they prepare the sashimi?

I wonder why the animal rights advocates from the west never make any noise about this cruel practice.