ELI5: Explain Like I'm 5

Firth

Hi there! Do you want to learn about firths? A firth is basically a narrow inlet of the sea, often found in Scotland. It's like a river, but it actually leads to the ocean or the sea. The water in a firth can be salty or fresh, depending on whether it's fed by a river, or by seawater. Sometimes, firths can be very deep, and have big ships and boats sailing through them. Other times, they can be very shallow, and have lots of little fish swimming in them. So, a firth is just a special kind of place where the sea meets the land, and the water keeps flowing back and forth.
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