Pisces the Fishes vs Fish

Pisces the Fishes and Fish both are nouns.

Word	Noun	Adjective	Verb	Adverb
Pisces the Fishes	Yes	No	No	No
Fish	Yes	No	No	No

As nouns, Pisces the Fishes and Fish are synonyms defined as:

Pisces the Fishes and Fish: the twelfth sign of the zodiac; the sun is in this sign from about February 19 to March 20

Other synonyms of Pisces the Fishes include Pisces.

Pisces the Fishes (noun)	Fish (noun)
the twelfth sign of the zodiac; the sun is in this sign from about February 19 to March 20	the twelfth sign of the zodiac; the sun is in this sign from about February 19 to March 20
	(astrology) a person who is born while the sun is in Pisces