It is not swallowing the water (swallow means passing it to its stomach), it is gulping as part of the process of passing water over it gills. The motion you see as swallowing is in fact the fish breathing. Obviously therefore it does this all the time.
Crocodiles swallow their foods whole, even fish, bones and all. They have alimentary canals and digestive systems designed to manage and extract nutrients from all parts of their prey.
Seals hunt fish, in the water, all the time
They won't react at all, because fish need to be placed in room temperture water every time you change their water.
all fish lives in water
Overfeeding or poor water quality
Well it depends on the fish. If it is a fresh water fish then it lives in fresh water, salt water fish live in salt water.
build muscle, and stay consistent with your fitness routine.
One type of animal that feeds on fish is a pelican. Pelicans are large birds known for their long beaks and throat pouches that they use to catch and swallow fish whole. They are often found near bodies of water where fish are plentiful.
Salmon are fish. All fish live in water.
I have a 20 gallon fresh water fish tank. I have one gold fish that i think is pregnant again. She just hides all the time is that ok?
You will be fine if you swallow a molar or tooth. Kids do it all the time and they don't know it. They're fine. No harm is done.
of course is sea water fish conquer more. due to 68 percent of earth is cover in sea water 3 percent is fresh water and glaciers