We haven’t seen a new aquatic family since aquatics were introduced so it’s time we should finally get a new one. Of course one family and my favorite should be the ichtyosaurs.
Like there are large and small plesiosaurs there should be large and small ichtyosaurs.
Large ichtyosaurs are surface while small ichtyosaurs are reef
Large ichtyosaurs :
Thallattoarchon
Temnodontosaurus
Cymbospondylus
Shonisaurus
Shastasaurus
Small ichtyosaurs :
Mixosaurus
Ophtalmosaurus
Ichtyosaurus
Mosasaurs and sharks would have hunted sea turtles, I get where your coming from but the games not exactly accurate with the class advantage to predator prey situation. And we definitely need no more surfaces currently.