Ben 10 season 1 episode 3 : The Krakken

Description
Ben encounters a lake monster called the Krakken and Captain Shaw, a fisherman obsessed with catching it. He soon finds out the creature is upset because Jonah Melville, a poacher in the guise of an animal lover, is stealing the creature's eggs. After Ben retrieves the eggs, a close scene is shown with the Krakken cuddling her regained eggs in her nest.