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a Hangfish has:

a single nostril at the tip of its snout

and has sensory tentacles around its mouth

as well as slime glands and 1 pair of gill openings.

A Lamprey has :

a mouth lined with teeth

a single nostril at the top if his head

7 pairs of gill openings

and no slime glands

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13y ago

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More answers

These two fishes are considered jawless fishes and represent on of the earliest developments in vertebrates.

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9y ago
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The jawless condition.

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14y ago
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Q: What is the difference between a lamprey and a hag-fish?
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