Final answer:
The sentence "Los peces no dormen" is grammatically incorrect as written. The correct form of the verb "dormir" (to sleep) for the third person plural (fish) in Spanish is "duermen." The word "duermen" agrees with the subject (fish) in number and person, reflecting that fish do not sleep.
Step-by-step explanation:
The sentence "Los peces no dormen" is grammatically incorrect as written. The correct form of the verb "dormir" (to sleep) for the third person plural (fish) in Spanish is "duermen." Therefore, the correct sentence should be "Los peces no duermen." The word "duermen" agrees with the subject (fish) in number and person, reflecting that fish do not sleep.
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