A lion's roar, for instance, will show off several beautifully.
On the other hand a domestic cat's yawn is unlikely to be very threatening - and a gorilla's is designed to keep the peace.
and the walrus:
show off their canines pretty much all the time. (Though, if you're a vampire, you won't be able to see yours. Except possibly with a selfie.)
The best canines to spot are a dog's, because canine means anything to do with a dog (or, indeed, a dog itself), and so a dog's canines are, very pleasingly, a canine's canines.
Photo by Miro Cacik.
Or I suppose you could even term them a canine's canine canines: so three hundred and three points if you see him and all his friends.
Do watch out for Cruella, though.
Spot the frippet: canine. This word is from the Latin canis, which means dog.