Two bodies of water merging in the Gulf of Alaska. It is a result of the melting glaciers being composed of fresh water, while the ocean has a higher percentage of salt. The two bodies of water have different densities, therefore making it difficult to mix.
"Come to Me, all you who labor and are heavy laden, and I will give you rest. Take My yoke upon you and learn from Me, for I am gentle and lowly in heart, and you will find rest for your souls. For My yoke is easy and My burden is light.” Matthew