From the Beginning - Sammy the Sea Serpent, #1

Escape to Sammy's fantasy world of epic adventures where creatures of all kinds can talk to each other and to people. From the depths of the sea to the mountain top on an uncharted island lives some unique creatures like the twin sea serpents with legs and feet. The series starts when the earth is inhabited by only 3 types of creatures: sea creatures, land creatures and creatures with wings. Twin sea serpents Agnes & Horace along with Eric the dragon manage to survive the Ice Age to wake up to a whole new world in the 21st century.
Agnes and Eric's first child Tommy is born with the help of the local natives and Sammy is born 3 years later. Both children are unique with the body of a sea serpent-like their mother and with dragon wings like their father. Even though Tommy is the oldest, it is clearly Sammy who is the leader as they embark on their many adventures.