Please look at this dolphin.

Is this dolphin's mouth closed or open?

I say it's closed, it's just a shitty perspective'd dolphin. But, my friends think otherwise.

there is a thin ridge of light blue underneath the black line at the bottom of the upper "lip", which does make it look closed, however i suspect it might have been drawn on afterwards to make it look clearer, possibly by someone who also thought it was closed? but IMO the concave lighting and the fact that what maddie thinks is the "chin" has a pretty well defined jawline outweigh that

i just think he looks like a duck

sorry you're wrong @nine-moonbeams , there being a slight shade of pink means NOTHING, it's reflectivity, and a double chin