RIDDLE - AN OVERVIEW

Q: My pores and skin is eco-friendly and slippery, I've four legs and webbed feet, I hop on land and swim underwater, I really like bugs and small fish to take in. What am I?Concern: The ages of the mom and his daughter incorporate as many as 55. In case you reverse the digits on the mom's age, you receive the daughter's age. How outdated are they?