Definition

1. Noun:
   • A larval salamander of mountain lakes of Mexico that usually lives without metamorphosing: A type of salamander that retains its larval, aquatic form throughout its life in specific high-altitude lakes.
   • A large salamander of North American rivers and streams: A fully aquatic, large-bodied salamander species found in freshwater habitats in North America.
   • An aquatic North American salamander with red feathery external gills: A permanently aquatic salamander characterized by its conspicuous, bushy red external gills.

Usage Examples

• Noun:
  • The biologist studied the unique mud puppy that never undergoes full metamorphosis.
  • We found a mud puppy hiding under a rock in the river.
  • The mud puppy uses its red feathery gills to breathe underwater.

Advanced Usage

• The term mud puppy is used specifically in zoology and herpetology to refer to these distinct salamanders. It is a common name, and its use implies a North American (or, in one case, Mexican) aquatic context.
• In casual conversation, it might be used by fishermen or naturalists familiar with local wildlife.

Variants and Related Words

• Necturus: The scientific genus name for the North American mud puppies.
• Axolotl: A different but related neotenic salamander (from Mexico), often confused with the mud puppy. The axolotl is famous for its regenerative abilities.
• Waterdog: A common regional name for the larval form or for the mud puppy itself.

Synonyms

• Waterdog (common name)
• Necturus (scientific genus name)

Notes on Different Meanings

The three definitions refer to different but related salamander species: 1. The first refers specifically to a Mexican species (Ambystoma sp.) known for neoteny (retaining larval features). 2. The second and third definitions typically refer to members of the genus Necturus, the true mud puppies of the eastern United States and Canada. The "red feathery gills" are a hallmark of Necturus.

Related Phrases/Idioms

• There are no common idioms or phrasal verbs using mud puppy. It is a specific zoological term.

Noun

1. larval salamander of mountain lakes of Mexico that usually lives without metamorphosing
2. large salamander of North American rivers and streams
3. aquatic North American salamander with red feathery external gills