Is "There are ten sheeps in the field" correct?

Why

Divya's expectation that a plural should visibly change from its singular is true for the overwhelming majority of English nouns — cat/cats, dog/dogs. A small set of words, though, use the EXACT SAME form for both singular and plural, with no change at all: one sheep, two sheep; one fish, two fish (in most everyday use); one deer, two deer. These are called zero-plural nouns, and "one sheeps" or "ten sheeps" is never correct, however tempting it feels to add the usual "-s". English has no single rule that predicts which nouns fall into this small group — like the irregular plurals, they simply have to be learned as exceptions to the general "add -s" pattern. Test: say "I saw one sheep and then five more sheep" out loud — the word doesn't need to change to show that the amount changed, because the surrounding numbers already tell you that. Her grandfather is right: "sheep" stays exactly the same in the plural, one more small, unpredictable exception in a language full of them.