| Ponyfish have a very protractile mouth, a phenomenon which can be demonstrated by squeezing the head, when the mouth will shoot forward. |
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| Trap termites using their long protractile tongues, which are covered with a thick, sticky saliva. |
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| In blennies the palatines are toothless, and the mouth not protractile. |
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| Wrasses characteristically have a protractile mouth, cycloid scales, and a single continuous dorsal fin lacking an obvious notch between the soft and spiny portions. |
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| Should we not call it a protrusible or protractile or even a protrusive roof? |
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| Lips were fleshy and not protractile, being the superior larger than the inferior. |
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