2006-11-23 01:18:55 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Zoology
All fish swim with their mouths open at least a little. This is a big part of how water gets to their gills so they can take in oxygen and get rid of carbon dioxide.
2006-11-23 01:25:06 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Just about all kinds of fish do. This allows water to flow in through their mouths and out through their gills, providing them with oxygen. Bony fishes have gill covers which pump water over their gills as they open and close, so they can breathe even when they are not swimming.
2006-11-23 17:45:26 · answer #2 · answered by PaulCyp 7 · 0⤊ 0⤋
A whale, because its mouth is ALWAYS open to consume planktons and tiny sea-creatures
2006-11-23 01:20:42 · answer #3 · answered by Anonymous · 0⤊ 1⤋
all kinds of fish
2006-11-23 01:23:01 · answer #4 · answered by JAMES 4 · 0⤊ 0⤋
sharks
2006-11-23 04:11:39 · answer #5 · answered by az_ zoo 2 · 0⤊ 0⤋
sharks
2006-11-23 01:19:53 · answer #6 · answered by Anonymous · 0⤊ 0⤋
stupid ones!
2006-11-23 01:20:50 · answer #7 · answered by luvthat88car 3 · 0⤊ 0⤋