How large are the two fish in question? Why do you think the angler is the culprit rather than knowing for certain?
What makes it one-of-a-kind angler? I don't think I've heard of such a thing. Something to do with an odd fin shape?
Provided the angler is still acting normally, it's probably okay. Hopefully it wasn't stung. If it swallowed the lion headfirst, I suppose it could have managed to not ***** itself on any of the spines.
