Watch out for the undertow!

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One kind of extremely dangerous marine current is the rip current, which is also known as the ebb or return current. In front of the beach, a tremendous water flow is created by the sea's wave action. The buildup of water along the coast results in a rise in pressure, which needs to be countered by a swift return flow that carries everything in its path as it goes from the coastline into the open sea.

We may identify it by observing the sea's waves: if you spot a section of "flat" waves, it indicates the presence of a rip current. Anyone who is in that location is practically pulled towards the sea since the water flows in the opposite way along that stretch.
Usually, the undertow develops in a channel along the coast, where the water is deeper and between two sandbanks. It's crucial to pay attention to the waves and the sea, like we were saying. If the crests of the waves are white, it indicates that the seafloor is elevated.

Because they are situated at a seabed that is much higher than the one that has just been described, the regions lacking white crests are usually the ones that should be avoided. Here, return currents might probably form.

If we come into a rip current, swimming parallel to the coast is a decent way to try to escape it without getting too enthusiastic and wasting all of our energy trying to get to the shore immediately.