question about error id in blue book

<p>on pg 602 # 16, the word "fish" is actually correct as a plural noun. How do i tell if plural forms of words like fish can be written both as "fish" and as "fishes"?</p>

<p>The standard plural of fish is fish (as seen in the title of the Dr. Seuss book "One Fish, Two Fish, Red Fish, Blue Fish"). The same is true of sheep, deer, moose and salmon, among other words</p>

<p>so besides specific animal group names, are there other groups?</p>

<p>I looked around online and the only other word I found was aircraft. I also found this note about fish vs fishes: "The plural for one species of fish, or caught fish, is fish, but for live fish of many species, or in poetic usage, fishes is used." Also, "Fishes is the proper English plural form of fish that biologists use when speaking about two or more fish species, as in "There are over 25,000 fishes in the world" (meaning that there are over 25,000 fish species in the world). When speaking of many fish that all are part of the same species, then the word "fish" is used, as in "There are several million fish in the species Gadus morhua" (Useful to know, but I doubt ETS/CB would test this on the SAT)</p>

<p>Hehe, this is an interesting question. I actually didn't know that but one could find the right answer another way. Notice how it says "each of them" meaning there is more than one. Notice the question is rated easy.</p>

<p>EDIT: Also think about it, you dont say All the blue "fishes" in the sea. You say All the blue fish in the sea.</p>

<p>arrgg. why ETS, why?</p>