What is the possessive form for hippopotamus?

Answer 1

The possessive form for "hippopotamus" is "hippopotamus's" when indicating singular possession. For example, "the hippopotamus's habitat." If the word is plural, the possessive form is "hippopotamuses'," as in "the hippopotamuses' territory."

Answer 2

The form hippopotamus's is a correct possessive form of the singular noun hippopotamus.

There are two accepted forms for possessive singular nouns ending in s:

Add an apostrophe (') after the existing s at the end of the word: hippopotamus'

Add an apostrophe s ('s) after the existing s at the end of the word: hippopotamus's