| Echidnas have long, protrusible, mucous-covered tongues that aid in the capture of prey. |
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| As soon as the whiskers pass over food, the protrusible mouth drops down with an elevator-like motion and rapidly sucks in its meal. |
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| These are trapped by the protrusible ciliated feeding tentacles, or lophophore. |
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| Therefore, many fish with protrusible jaws have a second set of jaws in the throat, termed pharyngeal jaws, that process food and free the outer jaw to continue feeding. |
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| Mouth terminal, protrusible, forming a tubular structure composed of two supramaxillary bones, which are associated with the maxillary bone. |
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