a platypus
platypus
a platapuss
ducks
The animal you are describing is the platypus. It is a unique monotreme, meaning it is one of the few mammals that lay eggs. The platypus has gills during its early developmental stages, a pouch for carrying its young, and webbed feet, which are adapted for swimming. These distinct features make it one of the most unusual mammals in the animal kingdom.
Salamander
Fins and gills or webbed feet.
From the video of an Antarctic Tern preening, it does appear that this animal has webbed feet.
all ducks have webbed feet, it helps them swim.
A web footed animal is an animal that has webbed feet like a duck, goose, or a Flamingo. Many birds have webbed feet. Frogs and some Salamanders do too.
dog, human
webbed feet
Rabbit