` :I agree that in contexts where it's not clear that Wikipedia is talking about a whale, we should save the reader a click (and not leave print readers in the dark) by mentioning what a rorqual is. In this article the paragraph already mentions whales and the reader can probably fill in the blanks, but I don't see any harm in clarifying that a rorqual is indeed a whale, rather than another larger sea creature that also lunge feeds. If 's objection is merely that ``rorqual whale`` looks clumsily redundant to experts in the same way as ``PIN number``, it's a simple matter to rephrase the sentence in such a way that it mentions that rorquals are whales without calling them ``rorqual whales`` - I'll do that now.   `