Where is the whale?

Go out into the world;
And there you’ll get your catch;
Cling not to your home
When your dream for a catch is an elephant;
Things, there are you get from home;
But, to make a really great catch;
Take a dive into the unfathomable waters
We all call ocean;
Wales aren’t found in streams;
Whales are found in oceans;
If you want to catch a small fish,
The stream is there for you;
If a whale is what you want,
Wide open is the mighty ocean.