Oxyuridae. A group of worms. That is the only thing i can find. Your answer isn't hippopotamus.... I'm sure you noticed it was missing the e.
Sequoia is a name of an American tree containing all five vowels.
The Spanish word for "eel" is anguila, which contains all five vowels: a, e, i, o, u.
There are several English words that contain all five vowels. These include abstemious, facetious, arsenious, acheilous, acheilous, as well as caesious.
stump
autau
Pourouma cecropiaefoli has all 5 vowels, is fruit commonly known as the Amazon Grape
All the five vowels words in English are .. A E I O U
* abstemious * facetious
Facetious
Mozambique (USA)
Aurelio has all five vowels, and there have been a few Aurelios in MLB history.
Vowels