There has been a lot of debate and confusion about whether or not all of the fishy faced friends are from the same race... I was looking through the old comic pages and comparing some things to satisfy my own general curiosity, and I found that the light house in the background of where the Slaads originated from is indeed not the same as the light house where the Deep Ones took Charon and Becka to meet the Ancient One.
If the Slaads came straight up from their origin (which I like to think), they are near the lighthouse with the cracks, while the Deep Ones seemed to take the girls to the lighthouse with the claw marks and the shed in front.
Did anyone else notice this? Is this just me being weird?
Also, while the Slaads seem to have thick skin, they look generally soft and mushy with big sharp point teeth and a lack of top lips. The Deep Ones have obvious lip definition with a hardened outer shell body and a sharp ridge back.
Their intelligence also comes into question, with the ability for the Deep Ones to communicate clearly in English, while the Slaads seem only able to bring across very general words and ideas (delicious, smell, taste, shadowchild).
The Deep Ones also seem to have the ability to shapechange while we haven't seen anything in that style from the Slaads.
While they both have many similarities, face, eye formation, ears, and sense for "Shadowchild" I'd say they are related, but definitely different species. If nothing else, they are rival clans/races.

