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Britannica Sources used in this answer

How many Antarctic fish belong to the order Perciformes?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
Bluefin tuna swimming underwater in a group, with silvery bodies and streamlined shapes, near Japan.
perciform Bluefin tuna (Thunnus thynnus orientalis) in the waters near Japan.

Approximately 75 percent of the Antarctic fish fauna belong to the order Perciformes.1