What is the average IQ of a fish?

Answer 1

Since there are still many species of fish for which no IQ has been measured, the answer to this question is still unknown. However, we do know that IQ depends heavily on the species of fish. For instance, goldfish tend to be very unintelligent, with IQ's measured in the 30-40 range, while some fish (such as freshwater salmon) have had IQ's measured to be as high as 130. To put this in context, President Obama has an IQ of 125. Generally, there is a tendency for fish which live in warmer climates to have higher IQ's. Theories on why this is tend to vary, but there seems to be an emerging consensus that warmer climates are more hospitable to marine life. This leads to increased interspecies competition, and ultimately more evolutionary pressure selecting for intelligence.