Yes, dried shrimps contain sea salt.
In fact, it is easy to handle if you want to feed fish. Generally, many fish feeds contain shrimp.
You first wash the shrimps and wash out the salt, which is a little bit less scary. Because under normal circumstances, we also need to add an appropriate amount of salt to the water in the fish tank to prevent fish scale rot. Then you dry the dried shrimps and grind them into granular form.
So you can feed the fish! Baidu