Considering that alcohol is a drug of high consumption, it is very important to understand its action on the embryonic nervous system and its role in the origin of cognitive deficits misunderstood and, consequently, neglected, since these deficits can affect the quality of life or relate to the origin and aggravation of mental illness.

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In the discussion of the text it is proposed that during the task of spontaneous alternation in the Y- maze due to the absence of novelties during the random exploration the fish starts to perform the exploration in alternating sequences (less cognitively demanding, according to an adaptation of the "law of the less mental work ") in this sense, it might be interesting in future analysis to identify in which moments of the test the patterns of alternating exploration emerge in order to identify if really they appear after the phases of exploration random and perhaps better elucidate the meaning of this behavior and because ethanol specifically changed this parameter.

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In the procedure described for the task of appetitive conditioning it is mentioned that after training the fish were exposed to 5 trials of initiator light “on” (30-sec), or “off” (30-sec), however, in results is described that que fish were presented with the stimulus light 5-times (10-sec), interspersed with non-light presentations (10-sec).