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Fish served as ikizukuri.
Ikizukuri (生き作り), also known as ikezukuri (活け造り), is the preparation of sashimi made from live seafood. The most popular sea animal used in ikizukuri is fish but octopus, shrimp, and lobster may also be used. The practice is controversial owing to concerns about the animal's suffering, as it is still alive when served. [dubious– discuss]
The restaurant may have one or several tanks of live sea animals for a customer to choose from. There are different styles in which a chef may serve the dish but the most common way is to serve it on a plate with the filleted meat assembled on top of the body.