This statement is a common misconception and is not entirely accurate. Dolphins are highly intelligent creatures with complex social structures, problem-solving abilities, and communication skills. Although their intelligence is difficult to measure using IQ, some studies have shown that dolphins have cognitive abilities similar to those of primates and are capable of more complex problem solving and learning.

It is important to note that intelligence is a complex and multifaceted trait that is not easily compared across species. Dolphins have developed their own unique set of skills and abilities that allow them to thrive in the marine environment. Comparing their intelligence to that of a 7-year-old may not be the most accurate or meaningful way to understand their cognitive abilities.