Singular/plural possessive form of fish? [closed]

Solution 1:

As Wikipedia and the Purdue OWL both note:

  • Singular possessives always add -’s.
  • Plural possessives add -’s if they don't already end in s.

Because the plural fish does not end in s, it becomes fish’s, just like the singular form.

Note: In some contexts, the plural of fish is fishes. Because that does end in s, it becomes fishes’.