CARTOON RIDDLE NO FURTHER A MYSTERY

Q: My pores and skin is eco-friendly and slippery, I've 4 legs and webbed feet, I hop on land and swim underwater, I really like bugs and small fish to try to eat. What am I?Concern: The ages of the mother and his daughter insert nearly fifty five. Should you reverse the digits in the mother's age, you will get the daughter's age. How old are they?