I had no difficulty interpreting the scientist's humor in this either, perhaps because I was good friends for years with one. This article was obviously (to many of
us) written with what is termed "writer's license"...a little intentional distortion woven-in for the sake of impact. Nothing rare about that either.
I think you're correct zina10...the seal is just "enduring", as most wild animals must with non-existent healthcare.