Yes, but how it’s done is hard and expensive. If you just pump it into one spot you kill everything around with high salt concentrations. You can pump it far out to sea and disperse it over a large area, but that requires pipes going out to sea. The pipes would probably be made of metal, which salt water and metal don’t mix well, not to mention the brine in the pipe. You also need pumping stations along the pipe because it can’t perpetually slope down, and if it goes below sea level it needs to be pumped out.
Basically, it’s complicated and expensive and not as easy as just dumping it into the ocean.