Asked in Saltwater Fish, Freshwater Aquariums
Why do your fresh water fish have open mouths?
Not all freshwater fish have permanently open mouths. In fact, very few of them do. But the reason they open their mouths so often is they have to do it to breathe. They suck in water and pass it over their gill fillaments (like our lungs) where Oxygen is taken in and Carbon dioxide etc is passed out. ...
Asked in Fish
Could a fish survive without opening and closing there mouths?
No. If they didn't open and close their mouths, water couldn't flow through their body, and then out their gills. Thus, they wouldn't survive. ...
Asked in Alligators and Crocodiles
Why do crocodiles sleep with their mouths on the beach?
Crocodiles are often seen on the beach, looking like they are asleep, with their mouths open. What they are doing is basking, they keep their mouths open to regulate their body temperature. People sweat, dogs and cats pant, and crocodiles open their mouths :) ...
Asked in Cats (Felines), Cat Health, Cat Behavior
Why do cats sometimes open there mouths while purring?
Cats have scent glands in their mouths so when they are doing things with their mouths open it's because they are scenting something using their mouth rather than nose. ...