Yup, that be the one! I cherished that book as a kid. In the Mail Call section of TFH a kid wrote in (probably our age) about "Sea Monkeys". It was like something from the Saturday Night Live character, the one that goes into a long politcial comment, only to find out she misread or misinterpreted the topic and we heard the inevitable, "Never mind". Anyways, this kid had ordered Sea Monkeys and wante to know all baout them, what they ate and their breeding habits, etc... The reply was, "They're brine shrimp".
I grew up reading TFH magazine, so when FAMA started publishing, I was a little jealous for them. But it was great reading about saltwater fish & inverts, while TFH only dealt with fresh. They did a good job.