Mudpuppy (Necturus maculosus)

Also known as Aquatic Waterdog, Common Mudpuppy, Waterdog

Description

Also known as Aquatic Waterdog, Common Mudpuppy, Waterdog.

Found during the day under bank overhangs, debris and rocks, out at night foraging for food over the bottoms of lakes, ponds, rivers, streams and wetlands.
They feed nocturnally on small fish, insects, molluscs and worms.
Mudpuppies are able to live under the ice when lakes freeze.
Length - 33cm
Depth - 0-30m
Widespread North America

These are Salamanders and live an entirely aquatic lifestyle. They have flattened limbs for slowly walking across the bottom but can also have short swimming spurts.
Their external gills resemble ostrich plumes and their size depends on the oxygen levels present in the water, if the water is stagnant their gills will be larger than in clear flowing waters. Ref: https://en.wikipedia.org/wiki/Common_mudpuppy

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