|Relatives:||Jonas Marks (father)|
Dennis Marks is the son of Jonas Marks. He was born on April 3, 1970. When he was 12-years-old, he was taken to the Metropolis Medical Center for surgery. But the hospital staff were unable to operate on him, because he was in need of a blood transfusion, and the only person with his blood-type was his father, who was in the Amazon. They then call in the Super Friends and Aquaman, the Wonder Twins and Gleek find the boy's father.
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