Slaesosaurus

The slaesosaurus has replaced its ancestor, the terrarian as well as it distant ancestor the amphibarian. It has become the apex predator in the Wind coastline. It has doubled in size and can move freely on land and in the water. Its tailfins have turn into a flat tale fluke that not only works for propelling it through the water but as a 3rd foot on land. This allows it to move in an inching movement across the beach.

They spend more time sunning themselves on the beach using their back sails. The sails can flatten down when it the water to help reduce heat loss in the polar waters but quickly heat them up when on land. The males will fight over prime sunning grounds by nipping at each other and stabbing each other with their flipper spikes. Males can become wounded after such fights and many have scars from confrontations. The males with the best sunning spots get the right to mate with any of the females who comes to his spot.

Their gill-pouch has become more efficient and as long as it can stay wet they can gulp air and survive outside the water. The pouch keeps their gills constantly wet when not gulping. When in the water the gills work as normal gills do and they can stay underwater indefinably. Like their ancestors they are ambush predators who will wait at the seafloor in ditches they have dug into the sand. Then they wait for prey to pass overhead and will snatch them up and even case them onto land, if the prey is amphibious.

Unlike their ancestors they can heat up and act warm blooded when they need to be active or cool down and be cold blooded when they need to slow down their metabolize and wait for prey. They typically ambush prey at dawn and dusk.