F is for fangtooth fish.
This guy is freaky, looking up photos made my skin crawl a bit. I had enough time to read that they only grow to about 6 inches long, so maybe not too nightmare inducing, before I had to stop looking. I decided I’d got enough of the gist to do a sketch and so didn’t read any more and have no more facts to impart.
If anyone wants to look up something redeeming about them then please do leave a comment and I’ll gladly learn without having to be face to face with one.