Removing the filler "uh" the sentence becomes "Like their purpose." Which could be semantically understood as "[I/He/They] Like (or enjoy) their (whale's song) purpose." A semantically ambiguous sentence is just that, ambiguous. This sentence can have multiple meanings.

Also, conflating dialects, verbal fillers, and languages is asinine and you know that is not what my original point was. Writing casually about an expert domain is like, uh, different than writing spoken word as written, ya know?