de.wikipedia.org/wiki/Blauwal

The article identifies blue whales as protected under the Washington Convention/CITES Appendix II (“Anhang 2”), but authoritative listings place Balaenoptera musculus in Appendix I.

NOAA Fisheries’ species directory entry for the blue whale lists its protected status as “CITES Appendix I”. NOAA’s blue whale species page likewise shows “Protected Status … CITES Appendix I Throughout Its Range.”

That means the article has the appendix number wrong: for blue whales, the relevant CITES listing is Appendix I, not Appendix II.

This sentence says blue whales are distributed in all of Earth’s oceans. NOAA’s species page for the blue whale says instead that blue whales are found in all oceans except the Arctic Ocean. NOAA’s Office of National Marine Sanctuaries gives the same range description: blue whales occur in all ocean basins, except the Arctic Ocean.

So the article’s wording is too broad. A more accurate description is that blue whales have a nearly worldwide distribution, but not in the Arctic Ocean.

Authoritative NOAA sources do not describe blue whales as occurring in all world oceans. NOAA Fisheries states that blue whales are found in all oceans except the Arctic Ocean, and NOAA’s Office of National Marine Sanctuaries similarly says they occur in all ocean basins, except the Arctic Ocean.

Because the Arctic Ocean is excluded in these official range descriptions, saying the species occurs in all world oceans is inaccurate.