1. mud puppy, Necturus maculosus, salamander

usage: aquatic North American salamander with red feathery external gills

2. hellbender, mud puppy, Cryptobranchus alleganiensis, salamander

usage: large salamander of North American rivers and streams

3. axolotl, mud puppy, Ambystoma mexicanum, ambystomid, ambystomid salamander

usage: larval salamander of mountain lakes of Mexico that usually lives without metamorphosing

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