They open it very wide.
dory
You can't. You can only open your mouth as wide as your jaw will let you.
Open the mouth wide.
Swallow prey
Birds
because fish have no eyelids
the fish opens its mouth less as the water gets colder.
A python can open its mouth very wide to swallow prey, stretching up to four times the diameter of its own body.
roughly 65 degrees
Wide open. A gaping hole is a wide open hole. A gaping mouth is one which is hanging open, usually from astonishment.
A snake can open its mouth wide enough to swallow prey that is larger than its own head.
No , nostrils are absent in fish , fish inhale water by open mouth .