What was this movie called?

I remember watching this a couple years ago. It was about a little boy who found an egg and it hatches. It's a little baby serpent thing. He raises it in his bathtub for the first couple of days cuz it likes water. He feeds it potatoes. It grows up and goes swimming in the lake/ocean one time and takes the boy on a ride with her. People think it looks like the Loch Ness Monster. Then some important people tries to capture/kill it and bombs and nets start trying to get the sea creature thing. Then in the end, it escapes. The creature has a long neck and it has flippers.

Sorry for the fuzzy details but i really want to know what the title was. Thanks.