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Name: Rex P Frost
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From the students in my grade 7 science class who are doing a an assignment on marine fish: What stops a fish from getting a stomach full of salt water when they catching other smaller fish to eat?

They take in salt water, but can expel most of it back through the gills or out through the mouth through the teeth and still swallow the food. Whales (mammal not a fish) have a bony filter so they can eat very small plants and animals and not swallow the salt water.


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