Thank you. I attempt to learn one new thing each day and your meme gave me the needed lesson. Well, the inspiration to look up this animal. For that, you earn my upvote and comment.

I was reading about it on Wikipedia... I don't know about the "non-swimming" part. I guess cause they are heavy from being "bony"? I don't know....

It comes from their tendency to float on the top of the ocean so birds can come along and clean the parasites off of their skin. They can swim, but do this. They can swim strong enough that they can actually launch themselves up to three meters into the air in attempts to dislodge the parasites. Just ask any parent that's had a kid bring head lice home from school. LOL!