web-footed

US /ˈweb.fʊtɪd/
UK /ˈweb.fʊtɪd/
"web-footed" picture
1.

having feet with toes connected by a web of skin, as in ducks or frogs

:
Ducks are web-footed birds that are excellent swimmers.
The frog's web-footed design helps it move efficiently in water.