A while back, I stumbled across a picture of a horse that had apparently sustained some kind of injury that resulted in its neck healing with a hole right through it from side to side.
Warning: here comes a picture of the above-described phenomenon - it’s not gory, just weird, but I’ll de-linkify it so that nobody can complain they accidentally looked and it spoiled their afternoon nap.
-Apparently, this really is a genuine photo, not a photoshop - if so, it should be noted that the horse’s spine will pass through the lower section - the upper section being muscle and other soft tissues.
But even if it is fake - I don’t want that to detract from the question here, which is:
What animals, if any, naturally have holes in them? And for the smart-arses, I’m not talking about the sort of holes that have a mouth at one end of them - I don’t think I even really mean the sorts of holes that fish have for their gill covers - although that’s closer, because I’m looking for animals that naturally have holes through which daylight can be seen without any trouble - are there any?