About the series: Each book in the Welcome to the World of Series introduces children to wildlife through color photographs, lively description and amazing fact

Describes the physical characteristics, behavior, and habitat of both sea otters and river otters.

"Marine biologist Brent Hughes discovered a surprising connection between sea otters and sea grass at an estuary in northern California. Follow science in actio

A mother giant river otter leaves the water and finds an underground den to give birth to her babies. After a month, the young ones come out of the den to begin