Yes, fishes is a Scrabble word!

Verb

1. Seek indirectly

2. Catch or try to catch fish or shellfish

Noun

1. Any of various mostly cold-blooded aquatic vertebrates usually having scales and breathing through gills

2. The flesh of fish used as food

3. (astrology) a person who is born while the sun is in Pisces

4. The twelfth sign of the zodiac; the sun is in this sign from about February 19 to March 20